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| tle9221sx flexray transceiver automotive power data sheet rev. 1.3, 2015-09-21
tle9221sx data sheet 2 rev. 1.3, 2015-09-21 table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1 pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.2 modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.3 behavior of unconnected digital input pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 overview functional blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.1 transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.2 receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.3 communication controller interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.4 bus guardian interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.5 host interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.6 wake-up detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.7 power supply interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.8 bus failure detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.9 central state machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6 host interface and status information register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.1 host commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.2 status information register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.2.1 definition of the status information register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.2.2 sir readout mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.2.3 clearing sequence of sir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6.3 status information at the errn output pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6.3.1 reset the errn output pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 7 wake-up detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7.1 local wake-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7.1.1 local wake-up falling edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 7.1.2 local wake-up rising edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.2 remote wake-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.2.1 standard wake-up pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7.2.2 alternative wake-up pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 7.2.3 wake-up by payload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 7.3 wake-up flag and wake-up bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 8 power supply interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 8.1 inh output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 8.2 bd_off and undervoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table of contents data sheet 3 rev. 1.3, 2015-09-21 tle9221sx 8.3 undervoltage events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 8.3.1 undervoltage flags and undervoltage bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 8.3.2 undervoltage event at uv bat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 8.3.3 undervoltage event at uv cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 8.3.4 undervoltage event at uv io . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 8.4 power-up and power-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 8.4.1 bd_off state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 8.4.2 power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8.4.3 interim bd_standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 9 operating mode description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 9.1 operating mode transitions overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 9.2 operating mode change by host command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 9.2.1 entering bd_sleep mode via the bd_gotosleep command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 9.2.2 quitting bd_sleep by host command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 9.3 operating mode changeover by undervoltage flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 9.3.1 priorities of undervoltage events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 9.4 operating mode changes by undervoltage recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 9.4.1 bd_sleep mode entry flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 9.5 operation mode changes by the wake-up flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 10 bus error indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 10.1 setting the bus error bit by uv cc undervoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 10.2 setting the bus error bit by rxd and txd comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 10.3 setting the bus error bit by overcurrent detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 11 overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 12 transmitter time-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 13 mode indication, power-up an d parity information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 13.1 power-up bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 13.2 mode indication bit en and mode indica tion bit stbn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 13.3 even parity bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 14 general product characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 14.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 14.2 functional range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 14.3 thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 15 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 15.1 functional device characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 15.2 diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 16 application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 16.1 esd robustness according to iec61000-4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 16.2 bus interface simulation model parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 16.3 typical rxd output signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 16.4 operating temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 16.5 application example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 16.6 further application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 17 package outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 data sheet 4 rev. 1.3, 2015-09-21 tle9221sx 18 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 pg-ssop-16 type package marking tle9221sx pg-ssop-16 9221 data sheet 5 rev. 1.3, 2015-09-21 tle9221sx 1 overview 1.1 features general features ? compliant with the flexray electrical physical layer specification, version 3.0.1 and iso 17458 ? optimized for time-triggered in-vehicle networks with data transmission rates from 1 mbit/s up to 10 mbit/s ? optimized electromagnetic immunity (emi) ? very low electromagnetic emissi on (eme), supporting large networks and complex bus topologies ? very high level of esd robustne ss, 11 kv according to iec-61000-4-2 ? supports 60 ns minimum bit time ? optimized digital inputs to minimize jitter ? integrated bus guardian interface ? bus failure protection and error detection ? automatic voltage adaptation on the digital interface pins ? high current digital outputs, optimized to drive long wires and high capacitive loads ? green product (rohs compliant) ? aec qualified modes of operation and wake-up features ? sleep and stand-by operation mode with very low quiescent current ?receive-only mode ? separate inh output to co ntrol external circuitry ?local wake-up input ? remote wake-up via a dedicated wake-up symbol ? alternative remote wake-up ? remote wake-up via payload ? wake-up source recognition and indication data sheet 6 rev. 1.3, 2015-09-21 tle9221sx overview protection and diagnostics ? short-circuit protection ? overtemperature protection ? undervoltage detection on all power supplies ? transmitter time-out ? error and wake-up indication on the errn output ? status information register to in dicate error bits and wake-up bits ? high impedance bus inpu t in bd_off condition 1.2 description flexray is a serial, deterministic bus system for real -time control applications. it is designed for future requirements of in-vehicle control ap plications, providing data transmissi on rates up to 10 mbit/s. flexray is designed for collision-free data co mmunication. the nodes do not arbitr ate and the flexray communication controller (cc) guarantees a collision-fr ee bus access during normal operation. the tle9221sx flexray transceiver is a flexray bus driver (bd) and it accomplishes the physical interface between the communication controller and the bus me dium. fully compliant with the flexray electrical physical layer spec ification, version 3.0.1 (a cronym epl) and iso 17458. the tle9221sx supports the fo llowing functional classes: ? functional class ?bus driver voltage regulator control? ? functional class ?bus driv er bus guardian interface? ? functional class ?bus driv er logic level adaption? ? functional class ?bus driver remote wake-up? the tle9221sx supports data transmis sion rates from 1 mbit/s up to 10 mbit/s. besides the transmit and receive capability of the bus, th e tle9221sx provides arrangements for low power supply management, supply voltage monitoring and bus failure detection. in bd_sleep mode, the tle9221sx quie scent current decreases to a typi cal, total curren t consumption of 47.5 a, while the device is still able to wake up by a dedicated wake-up pattern on the flexray da ta bus or by a local wake-up event on the pin wake. the inh output pi n allows the control of external circuitry depending on the selected mode of operation. fail-safe features, like bus failure detection or the power supply monito ring, combined with an easy accessible status information register support the requirements of safety-related applications with extended diagnostic features. the tle9221sx is internally protected against transients on all global pins . global pins are bp, bm, wake and v bat . it is possible to use the tle 9221sx without any additional external protection circuitry while the tle9221sx meets the esd and iso pulse re quirements of the car manufactures. the tle9221sx is designed on the latest infineon smart power technology sp t, which combines power devices with a highly integrated logic process. base d on its digital design concept, the tle9221sx provides very high immunity against rf distur bances over a wide frequency range. based on the high symmetry of the bp and bm si gnals, the tle9221sx provides the lowest level of electromagnetic emission (eme) within a wide frequency range. data sheet 7 rev. 1.3, 2015-09-21 tle9221sx overview the tle9221sx is integrated in a rohs compliant pg-ssop-16 packag e. the tle9221sx and the infineon smart power technology spt are espe cially tailored to wi thstand the harsh conditions of the automotive environment and qualified accord ing to the aec-q100 standard. data sheet 8 rev. 1.3, 2015-09-21 tle9221sx block diagram 2 block diagram figure 1 block diagram v bat central state machine bus failure detector v bat 11 v cc v io 16 3 power supply interface inh 1 transmitter receiver wake-up detector bm bp 15 14 wake gnd 12 13 host interface 10 errn stbn en 8 2 communication controller interface bus guardian interface 9 7 6 5 4 rxd txen txd rxen bge v io voltage monitor data sheet 9 rev. 1.3, 2015-09-21 tle9221sx pin configuration 3 pin configuration 3.1 pin assignment figure 2 pin configuration 3.2 pin definitions table 1 pin definition and functions pin symbol function 1inh inhibit output; open drain output to control external circuitry, ?high? impedance in bd_sleep mode. 2en enable mode control input; digital input for the mode selection, integrated ?pull-down? resistor to gnd. 3v io level shift input; reference voltage for the digital input and output pins, 100 nf decoupling capacitor to gnd recommended. 1 2 3 4 5 6 7 8 16 15 14 13 12 inh en v io txd txen rxd bge stbn v cc bp bm gnd wake v bat errn rxen 11 10 9 data sheet 10 rev. 1.3, 2015-09-21 tle9221sx pin configuration 4txd transmit data input; integrated ?pull-down? current source to gnd, logical ?low? to drive ?dat a_0? to the flexray bus. 5txen transmitter enable not input; integrated ?pull-up? current source to v io , logical ?low? to enable the transmitter. 6rxd receive data output; logical ?low? while ?data_0? is on the flexray bus, output voltage adapted to the voltage on the v io level shift input. 7bge bus guardian enable input; logical ?high? to en able the transmitter, integrated ?pull-down? current source to gnd. 8stbn stand-by not mode control input; digital input for the mode selection, integrated ?pull-down? current source to gnd. 9 rxen receive data enable not output; logical ?low? indicates activity on the flexray bus, logical ?high? in case the flexray bus is ?idle?, output voltage adapted to the voltage on the v io level shift input. 10 errn error not diagnosis output; logical ?low? in failure case, output voltage adapted to the voltage on the v io level shift input. 11 v bat battery voltage supply; 100 nf decoupling capacitor to gnd recommended. 12 wake wake-up input; local wake-up input, terminated against gnd and v bat , wake-up input sensitive to signal changes in both directions. 13 gnd ground; 14 bm bus line minus; negative input/output to the flexray bus. 15 bp bus line plus; positive input/output to the flexray bus. 16 v cc supply voltage; transmitter supply voltage, 100 nf decoupling capacitor to gnd recommended. table 1 pin definition and functions pin symbol function data sheet 11 rev. 1.3, 2015-09-21 tle9221sx functional overview 4 functional overview 4.1 functional description flexray is a differential bus system. the data is exchanged via a dual wi re bus medium on the wires bp (bus line plus) and bm (bus line minus). three different bus symbols are support ed: ?data_0?, ?data_1? and bus ?idl e?. an active transmitter of the tle9221sx drives ?data_0? or ?data_1? to the bus medium, depending on the txd input signal. to sustain an ?idle? signal on the flexra y bus, the transmitter is turned off, th e voltage difference between bp and bm is below 30 mv, and the absolute voltage level on both bu s lines, bp and bm depends on the bus biasing (see figure 3 ): ? ?data_1?: ubus = ubp - ubm 300 mv positive voltage between bp and bm ? ?data_0?: ubus = ubp - ubm - 300 mv negative voltage between bp and bm ??idle?: |ubus|=|ubp-ubm| 30 mv figure 3 flexray epl bus signals without bus guardian interface t bp bm idle 2) data_1 data_1 idle 1) txd t 1) some nodes or all nodes inside the flexray network are in bd_normal mode. 2) all nodes of the flexray network are in low power mode. data_0 data_0 v bus t data_1 data_1 data_0 data_0 idle 2) idle 1) txen t rxd t data sheet 12 rev. 1.3, 2015-09-21 tle9221sx functional overview 4.2 modes of operation the flexray bus driv er tle9221sx supports four di fferent modes of operation: ?bd_normal mode ?bd_receiveonly mode ? bd_standby mode ? bd_sleep mode each mode has specific characteristic s in terms of quiescent cu rrent, data transmission or failure diagnostic. to enter the bd_sleep mode, the tle9221sx provides an intermediate mode, the so-called bd_gotosleep command. mode changes on the tle9221sx are either triggered by: ? the host interface and a host comm and on the input pins en and stbn. ? the power supply interface and an undervoltage event on one of the two power su pplies or the reference supply uv io . ? the wake-up detector and wake-up events either on the flexray bus or on th e local wake-up pin wake. while all power supplies are turned off, the transceiver tle9221sx is in bd_off condition or also called ?without supply?. in bd_sleep mode and in bd_standby mode the quie scent current consumption at all three supplies is tailored to reach the minimum, and th erefore only a limited set of the fu nctions of the tle9221sx is available. bd_sleep mode and bd_standby mode are also called low power modes. conversely the modes bd_normal and bd_receiveonly are ca lled non-low power modes. 4.3 behavior of unconnected digital input pins the integrated pull-up and pull-down resistors at the di gital input pins force the tle9221sx into a secure, fail safe behavior if the input pins are not connected and floating (see table 2 for details). if the txen pin or the bge pin is not connected in bd _normal mode, the transmitte r is disabled. if the txd input pin is open in bd_normal mo de and the transmitter is active, the transceiver tle9221sx drives a ?data_0? signal to the bus. if the mode control input pins of the host interface ar e not connected, the pull-down resistors on the en pin and on the stbn pin set the tle9221s x by default to bd_standby mode. table 2 logical inputs when unconnected input signal default state comment txd 1) 1) in bd_sleep, bd_standby, and also in bd_receiveonly mode, the inputs txd, txen and bge are blocked by the internal logic. to optimize the tota l quiescent current consumption, the pull-up and pull-down structures are disabled in bd_sleep mode, bd_stand by mode and bd_receiveonly mode. ?low? pull-down to gnd txen 1) ?high? pull-up to uv io stbn ?low? pull-down to gnd en ?low? pull-down to gnd bge 1) ?low? pull-down to gnd data sheet 13 rev. 1.3, 2015-09-21 tle9221sx functional overview the power supply interface detects missing supply voltages or a missing reference supply. the central state machine sets the tle9221sx into a fail safe mode when a supply is not available (details see chapter 8.3 ). data sheet 14 rev. 1.3, 2015-09-21 tle9221sx overview func tional blocks 5 overview functional blocks 5.1 transmitter the transmitter is the output driver for the flexray bus. it is based on a ?high? side and ?low? side push-pull unit. the push-pull units are supplied by the power supply uv cc (see figure 1 ). while driving a ?data_1? or ?data_0? signal on to the flex ray bus, the transceiver is active and enabled. during an ?idle? signal, the transceiver is turned off. figure 1 block diagram of the transmitter the transmitter is protected by an internal temperature sensor against overheating in terms of a short circuit on the bus lines bm or bp. the transmitter is contro lled by the communication controller interface (see chapter 5.3 ). the transmitter is only active in bd_normal mode. 5.2 receiver the receiver detects communication elements, like ?idle? , ?data_1? and ?data_0?, when it is not in low power mode. it is connected to the bp and bm i/o pins of the tle9221sx, together with the transmitter, the bus-failure detector, and the wake-up detector (see figure 1 ). based on a digital sampling concept, the receiver is optimized to withstand the rf immunity requirements of the automotive industry. the low pass input filter is tailored to support analog bi t times down to 60 ns. data bits below 60 ns may not be detected as valid communication elements. when the re ceiver detects activity on the flexray bus behind the input filter, the differential receiver di stinguishes whether ?data_0? or ?data_1? is signaled by the differential bus voltage. the bus activity information is provided to the bus guardian interface. the information regarding the flexray data bits is provided to the communication controller (see figure 2 ). the thresholds and the timings of the receiver are available in figure 38 and figure 39 . overtemp. sensor bp bm uv cc driver driver time-out communication controller interface uv cc data sheet 15 rev. 1.3, 2015-09-21 tle9221sx overview func tional blocks figure 2 block diagram of the receiver apart from receiving data, the receiver is responsible fo r biasing the flexray bus. the biasing of the flexray bus depends on the selected mode of operation. in bd_normal mode and bd_receiveonly mode, the voltag e ubias is connected to the bp and bm pins across the common mode resistors r cm1 and r cm2 . in bd_sleep mode, bd_standby mode and in the bd_gotosleep command the i/o pins bp and bm are connected to gnd via the common mode resistors r cm1 and r cm2 . when tle9221sx is not supplied, the bus biasing is open and is neither switched to ubias nor to gnd, the bp and bm pins appear to the flexray bus as a high-impedance input (see table 3 and figure 2 ). 5.3 communication controller interface the communication controller interface is the interfac e between the flexray transceiver tle9221sx and the flexray communication controller (cc). it comprises three digital signals: ? the txen (transmit data enable not) input pin ? the txd (transmit data) input pin ? the rxd (receive data) output pin table 3 bus biasing mode of operation bus biasing transmitter bd normal ubias active or disabled bd_receiveonly ubias disabled bd_standby gnd disabled bd_gotosleep command gnd disabled bd_sleep gnd disabled bd_off condition open disabled input filter bp activity detection clock source communication controller interface bus guardian interface r cm1 r cm2 gnd ubias bus biasing differential receiver + - bm data sheet 16 rev. 1.3, 2015-09-21 tle9221sx overview func tional blocks the logical i/o levels of all three digital pins are adapted to the reference voltage uv io . in case uv io is not available or in an undervoltage condition, the rxd output is set to logical ?low? and the input pins txd and txen are set to their default condition (see table 2 ). the communication controller logic block handles the interlock between txd and txen. the central state machine provides the interface to other tle9221sx fu nction blocks and handles the dependency based on the selected mode of operation (see figure 3 ). figure 3 block diagram of the communication controller interface the txd input of the communication co ntroller interface is active only wh en the transmitter is activated. to activate the transmitter, the transceiver tle9221sx needs to be in bd_normal mode, the txen input must be at logical ?low? and the bge input pin must be at logical ?high? (see table 4 ). the flexray transceiver shall never start data transmissi on with the communication el ement ?data_1?. therefore, the activation of the transmitter via th e txen signal is only possible while the txd signal is at logical ?low? (see figure 4 ). while the transmitter is enabled, the communication cont roller interface drives the serial digital data stream available at the txd inpu t pin to the flexray bus via t he transmitter. a logical ?high? signal at the txd pin drives a ?data_1? signal to the flexray bus and a logica l ?low? signal drives a ?data_0? signal (see table 4 ). communication controller logic block transmitter receiver central state machine uv io uv io uv io txd txen rxd data sheet 17 rev. 1.3, 2015-09-21 tle9221sx overview func tional blocks figure 4 flexray physical layer bus sign als with bus guardian interface the receiver of the tle9221sx is active in all non-low power operating modes. simila r to the txd input, the rxd output indicates a ?data_1? signal on th e flexray bus by a logical ?high? signal and the ?data_0? signal by a logical ?low? signal. in every low power mode, the txd and txen input pins are disabled. the rxd output pin is used to indicate the wake-up flag, while th e transceiver is in low power mode (see table 5 ). 5.4 bus guardian interface the bus guardian interface comprises two digital signals: ? the bge (bus guardian enable) input pin. ? the rxen (receive enable not) output pin. the logical i/o levels of the input and the outp ut pin are adapted to the reference voltage uv io . in case uv io is not available or in undervoltage condition, the rxen output is set to logical ?low ? and the input pin bge is set to its default condition (see table 2 ). the bus guardian logic block handles the connection to the transmitter and the receiver. the central state machine provides the interface to other tle9221sx func tion blocks and handles the dependency on the selected mode of operation (see figure 5 ). bge txen bp bm txd t t t transmitter on transmitter off transmitter on transmitter off the transmitter can only be activated while txd = low t rxen t rxd t idle data_1 data_1 data_0 data_0 data_1 data_0 data_1 idle data sheet 18 rev. 1.3, 2015-09-21 tle9221sx overview func tional blocks figure 5 block diagram of the bus guardian interface the bge input is an additional fail safe input, allowing external hardware to block the data stream driven to the flexray bus medium. switching the bge input to logical ?low? disables the transmitter of tle9221sx regardless of the signals on all the other digital input pins. the bge input is active only in bd_normal mode (see table 4 and figure 4 ). the rxen (receive enable not) indicates the activity on the flexray bus. in case th e flexray bus is ?idle?, the logical signal on the rxen is ?high?. any active data sign al on the flexray bus, regardless of whether it is ?data_0? or ?data_1?, is indicated by a logical ?low? signal on the rx en output pin. like the rxd output pin, the rxen output pin indicates also the wake-up flag while the transceiver is in low power mode (see table 5 and figure 4 ). table 4 txd/txen interface, acting as a transmitter mode of operation txen bge txd resulting signal on the bus bd_normal ?high? x 1) 1) x = don?t care x?idle? x ?low? x ?idle? ?low? ?high? ?low? ?data_0? ?low? ?high? ?high? ?data_1? all other modes x x x ?idle? table 5 rxd/rxen interface, acting as receiver with bus guardian interface mode of operation signal on the bus wires wake-up flag rxd rxen bd_normal, bd_receiveonly ?idle? x 1) ?high? ?high? ?data_0? x ?low? ?low? ?data_1? x ?high? ?low? bus guardian logic block transmitter receiver central state machine uv io uv io bge rxen data sheet 19 rev. 1.3, 2015-09-21 tle9221sx overview func tional blocks 5.5 host interface the host interface is the interface between the flexray transceiver tle9221sx and the flexray host controller. it allows the host to control the operating modes and to read status and diagnostics information. it comprises three digital signals: ? the en (enable) input pin ? the stbn (stand-by not) input pin ? the errn (error not) output pin the logical i/o levels of the pins ar e adapted to the reference voltage uv io . in case uv io is not available or in undervoltage condition, the er rn output is set to logical ?low? and the input pins en and stbn are set to their default condition (see table 2 ). figure 6 block diagram of the host interface the en and stbn pins control the modes of operation. the pins are connected to t he central state machine via an input filter. the input filter protects the transcei ver tle9221sx against unintentional mode changes caused by spikes on the en and stbn. bd_sleep, bd_standby x ?low? (set) ?low? ?low? x ?high? (not set) ?high? ?high? 1) x = don?t care table 5 rxd/rxen interface, acting as receiver with bus guardian interface mode of operation signal on the bus wires wake-up flag rxd rxen glitch filter central state machine uv io uv io uv io stbn en errn sir data sheet 20 rev. 1.3, 2015-09-21 tle9221sx overview func tional blocks the errn output signals failures, diagnostic and status information to the external host controller. the tle9221sx also contains a status inform ation register. access to the status in formation register is given by the host interface (see details chapter 6 ). 5.6 wake-up detector the wake-up detector is a separate internal function bl ock to detect wake-up events, be it a local or a remote wake-up event. the wake-up detector also enables the filtering unit to differentiate between real wake-up signals and floating signals or glitches on the wake-up lines. active in every operation mode, and also in the bd_normal or bd_receiveonly mode, the wake-up detector ensures that no wake-up si gnal gets lost due to a concurrent change of the operating mode. the wake-up detector provides feedback on the wake-up information to the central state machine for further processing (details see chapter 7 ). 5.7 power supply interface the power supply interface is the interface from the bus dr iver to the external supply voltages. it hosts the inputs to the power supplies v bat and v cc and also the level shift input to the reference voltage v io . to enable the control of external circuitry, like a voltage regulator for example, the power supply interface of the tle9221sx provides an inh output. all power supplies and the reference voltage are monitored and undervoltage conditions are indicated via the errn output on the host interface (details see chapter 8 ). 5.8 bus failure detector the bus failure detector monitors the data stream on the bm and bp i/o pins and compares the bus data with the digital data stream available at the communication controller interface. discrepancies between the bus data and the digital data are interpreted as a bus failure. the bus failure detector is acti ve only in bd_normal mode. all detected failures are signaled on the errn output by the host interface (see chapter 10 ). 5.9 central state machine the central state machine is the main logic block of the tle9221sx. it controls all functions of the tle9221sx, the failure management as well as the power-up and power-down operations. the central state machine also provides some internal registers to store status, diagnostic and failure information. ? information about the operating mode handling (see chapter 9 ) ? information about the status information register (see chapter 6 ) ? information about the power management (see chapter 8 ) ? information about the bus failure flag (see chapter 10 ) table 6 modes of operation 1) 1) no undervoltage flag and no wake-up flag is set. stbn en mode of operation ?high? ?high? bd_normal ?high? ?low? bd_receiveonly ?low? ?high? bd_gotosleep, automatically transferred to bd_sleep ?low? ?low? bd_standby data sheet 21 rev. 1.3, 2015-09-21 tle9221sx host interface and status information register 6 host interface and status information register the host interface is the main interface for: ? selecting and controlling the operation modes of the tle9221sx by host commands. ? receiving status information of th e tle9221sx at the errn output pin. ? retrieving diagnostics information of the tle9221s x by reading the status information register. the host interface is operational when the reference voltage uv io is in its functional range. in case the supply uv io is in undervoltage condition, the host interface is blocked and the operating mode of the tle9221sx flexray transceiver is automatically se t to bd_sleep mode (compare with chapter 9.3 ). 6.1 host commands the digital inputs en and stbn have dual functionality: ? en and stbn are used to select the operating mode. ? en and stbn are used to trigger the read -out of the status information register. the stbn, en and all other digital inpu ts of the tle9221sx are level-triggere d and protected with a glitch input filter. additionally, a digital input filter is pr ovided at the mode selection pins stbn and en. to get a valid host command, which triggers a change of the operating mode, the external signals at the pins en and stbn need to be stable at least for time t dbdlogic filter . signal changes with a smaller pulse width than the internal filter time t < dbdlogic filter are not considered valid ho st commands and the tle9221sx remains in its previous operating mode. within the time for mode change t = dbd modechange the flexray transceiver tle 9221sx changes to the selected mode of operation (see figure 4 ). all output signals are valid after the mode transition and when the time for mode change t = dbd modechange has expired. figure 4 example of a valid host command note: the time for mode change has to be considered fo r every change of the operat ion mode. all definitions in this data sheet are made consider ing the time for mode change dbd modechange , even if the time for mode stbn host command detection en t t bd_normal bd_standby t < dbdlogic filter mode transition t = dbdlogic filter t = dbd modechange mode change 100% uv io 50% uv io 0% uv io 100% uv io 50% uv io 0% uv io data sheet 22 rev. 1.3, 2015-09-21 tle9221sx host interface and status information register change is not explicitly mentioned, for example in logical status tables , mode diagrams or in elementary timing diagrams. 6.2 status information register 6.2.1 definition of the st atus information register failure, wake-up and diagnostic inform ation is stored internally in a 16-bit wide register in the tle9221sx, the so-called status information register, or abbreviated to sir (see table 7 ). 6.2.2 sir readout mechanism the sir is a ?read-only? register and the data can be read out serially by using en in put as a data clock. while the sir readout procedure is running, no operation mode change applies to the tle9221sx. this allows regular data communication and read-o ut of the sir at the same time. like all the other functions using the ho st interface, the reference supply uv io needs to be operational to read out the sir. the sir readout is possible in all non-low power modes and in bd_standby mode (see table 8 ). table 7 bit definition of th e status information register 1) 1) the bits are ?low? active. for example bit = 0, when set. bit description summary flag / bit bit 0 local wake-up bit wake-up flag bit 1 remote wake-up bit wake-up flag bit 2 reserved, always ?high? ? bit 3 power-up bit ? bit 4 bus error bit error bit bit 5 overtemperature error bit error bit bit 6 overtemperature warning bit error bit bit 7 transmitter time-out bit error bit bit 8 v bat undervoltage bit error bit bit 9 v cc undervoltage bit error bit bit 10 v io undervoltage bit error bit bit 11 error bit ? bit 12 wake-up source bit ? bit 13 en mode indication bit ? bit 14 stbn mode indication bit ? bit 15 even parity bit ? data sheet 23 rev. 1.3, 2015-09-21 tle9221sx host interface and status information register note: the sir readout depends on the current operating mode selected and not on the host command applied. in case of undervoltage events, the host command could be bd_norma l mode, but the operating mode is bd_sleep mode. in bd_sleep mode , no sir read-out is possible. figure 5 timing diagram for the sir readout in bd_normal mode during the sir readout, the en input acts as the clock and the errn output pin acts as the serial ?data_out?. irrespective of the digital signal at the stbn input, th e sir readout is always initialized by a signal change at the en input pin. when the host comm and bd_normal is applied to the host interface, the sir read-out starts with the falling edge at the en input (see figure 5 ). for the host commands bd_standby and bd_receiveonly the read-out starts with the rising edge at the en pin (see figure 6 ). after initialization, the internal time r starts and the tle9221sx awaits the ne xt signal change within the timing window den clock (min) < t < den clock (max). the next rising edge 1) enables the sir and the bits can be clocked out. table 8 readout mechanism and modes of operation modes of operation active / not active bd_normal active bd_receiveonly active bd_gotosleep command not active bd_standby active bd_sleep not active 50% uv io stbn t initialize host interface en enable sir den clock errn clock out sir t t den clock den clock den clock den timeout bd_normal mode bd_receiveonly exit sir select operation mode according to the host command 0% uv io 100% uv io 50% uv io 0% uv io 100% uv io 50% uv io 0% uv io 100% uv io errn status sir bit 0 sir bit 1 sir bit 15 sir bit 0 errn status data sheet 24 rev. 1.3, 2015-09-21 tle9221sx host interface and status information register if no signal change occurs after the in itialization within the time frame t < den timeout , the tle9221sx exits the sir readout procedure and changes the operating mode according to the host command applied. when the sir is enabled, every falling edge at the en input serially shifts out th e sir information at the errn output pin. with the first fa lling edge of the clock at th e en input, the least significan t bit, bit 0, is clocked out to the errn output successively followed by bit 1, bit 2, etc, with every successive falling edge of the clock at the en input.the sir bits are ?low? active, meaning th at the errn signal = ?low ? when the sir bit is set. note: the stbn input pin has no function when the sir readout is enabled and the readout procedure is running. nevertheless, it is recommended to keep the stbn pin stable (?high? or ?low?) during the sir readout procedure. figure 6 sir readout in bd_receiveonly or bd_standby mode the sir readout procedure can be termin ated at any time by stopping the cl ock at the en input pin. while the signal at the en pin is stable for the time t > den timeout , the tle9221sx exits the sir and changes to the operating mode according to the host command applied. note: it is recommended to leave the sir read out proced ure with the same en signal that was present when the read out procedure was started. when time t = den timeout expires, the mode change is triggered immediately. 1) while the tle9221sx is in bd_normal mode, the rising edge is the first signal change after initialization and enables the sir readout. for the bd_receiveonly and the bd_standby mode, there is an additional falling edge betw een initialization and the sir being enabled (compare with figure 5 and figure 6 ). errn status stbn t initialize host interface en enable sir den clock errn clock out sir sir bit 0 sir bit 1 sir bit 15 t t den clock den clock den clock den timeout errn status bd_receiveonly mode or bd_standby mode den clock sir bit 0 additional edge exit sir select operation mode according to the host command 50% uv io 0% uv io 100% uv io 50% uv io 0% uv io 100% uv io stbn = high or low high for bd_receiveonly mode low for bd_standby mode 50% uv io 0% uv io 100% uv io 50% uv io 0% uv io data sheet 25 rev. 1.3, 2015-09-21 tle9221sx host interface and status information register 6.2.3 clearing sequence of sir failure and status information is la tched in the sir and the bits need to be cleared by a host command. in order to avoid any status bit from being cleared, while the root cause of the bit en try is still present, the tle9221sx is equipped with a dedicated sequence to clea r the bits of the status information register. before clearing any bits, the tle9221s x checks, if the root cause of the bit entr y is resolved. only if the root cause of the bit entry has disappeared , the bit will be cleared. the sequence to clear the bits of the sir is started by: ? entering bd_normal mode via a host command. ? a complete readout of all 16 bits in the sir. in case the readout of the sir is in complete, for instance, due to a microc ontroller interrupt during the readout procedure, the bits in the sir remain set. in case the sir readout continues after the last bit (b it 15) has been clocked out, the tle9221sx continues and clocks out the first bit (bit 0) again. on the second readout the bits in the sir have been cleared. the bits will only be cleared if the root cause of setting them has been resolved. note: applying tle9221sx the host comm and bd_normal does not necessaril y clear the sir, since entering bd_normal mode can be prevented by an undervoltage event (see table 13 ). 6.3 status information at the errn output pin the errn output pin functions as a serial ?data-out? du ring the sir readout procedur e. in any other case, the errn output pin indicates the status information. the errn pin indicates failure, wake-up events and the wake-up source. the host command applied determines the incident that is signed at the errn output pin. the errn output pin is active ?low? (details see table 9 ). table 9 signaling at errn stbn en host command error bit 1) wake-up flag 1) errn condition error indication ?high? ?high? bd_normal ?high? x 2) ?high? ? ?high? ?high? bd_normal ?low? x ?low? ? ?high? ?low? bd_receiveonly ?high? ?high? ?high? ? ?high? ?low? bd_receiveonly ?low? ?high? ?low? ? wake-up source indication ?high? ?low? bd_receiveonly x ?low? ?high? wake-up source bit = ?high? ?high? ?low? bd_receiveonly x ?low? ? low? wake-up source bit = ?low? wake-up indication ?low? ?high? bd_gotosleep command x ?high? ?h igh? automatically transferred to bd_sleep ?low? ?high? bd_gotosleep command x ?low? ?lo w? automatically transferred to bd_sleep ?low? ?low? bd_standby x ?high? ?high? ? ?low? ?low? bd_standby x ?low? ?low? ? data sheet 26 rev. 1.3, 2015-09-21 tle9221sx host interface and status information register note: the status signal at the errn output depends dire ctly on the host command a pplied. since the selection of the operation mode doesn?t impl icitly depend on the host command but also on failure cases and wake-up events, it is possible th at the tle9221sx is in bd_sleep mode while the host command bd_normal mode is applied to the host interface (d etails see also table 15 , table 16 and table 17 ). as an example in figure 7 the tle9221sx indicates the er ror flag while the device is in bd_sleep mode due to an undervoltage event on uv bat . figure 7 status at the errn while uv bat undervoltage 6.3.1 reset the errn output pin the errn output depends directly on the status bits in the sir. resetting the bits in the sir automatically also clears the errn output and, vice versa, one bit in sir sets the errn output. as described in chapter 6.2.3 the sir can be reset by a dedicated host command or by the readout of the sir. since the sir and consequently also the errn output can only be re set by a dedicated host command, toggling at the errn pin is not possible. ?low? x bd_sleep x ?high? ?high? ? ?low? x bd_sleep x ?low? ?low? ? 1) ?low? active, the error bit and the wa ke-up flag are set wh ile active ?low?. 2) ?x? = don?t care. table 9 signaling at errn stbn en host command error bit 1) wake-up flag 1) errn condition stbn en t dretime errn t uv bat t errn t bd_sleep (because of uv bat undervoltage) 50% uv io 0% uv io ubduvv bat 100% uv io 50% uv io 0% uv io 100% uv io 50% uv io 0% uv io dretime errn 100% uv io host command = bd_standby errn = wake-up flag host command = bd_normal errn = error bit data sheet 27 rev. 1.3, 2015-09-21 tle9221sx wake-up detector 7 wake-up detector the flexray transceiver tle9221sx can detect differen t wake-up events via the central wake-up detector. these can be either remote wake-up events provided by the flexray bus or local wake-up events provided to the local wake-up pin wake. wake-up signals are: ? a falling edge at the local wake-up pin wake (see chapter 7.1.1 ). ? a rising edge at the local wake-up pin wake (see chapter 7.1.2 ). ? a dedicated wake-up pattern at the flexray bus (see chapter 7.2.1 and chapter 7.2.2 ). ? a wake-up pattern implemented in a standard flexray frame (see chapter 7.2.3 ). the wake-up detector is active in every mode of oper ation and works over the enti re operating range as long as uv bat is in its functional range (see table 20 ). detected wake-up events are analyzed by the central state machine and are compared with the overall device status. they may cause a change of the operation mode (details see chapter 9.5 ) and they may set a wake-up flag or a wake-up bit (details see chapter 7.3 ). 7.1 local wake-up the tle9221sx provides a local wake-up input wake , tailored to withstan d voltages up to u v bat (max). positive and negative signal changes on the wa ke pin trigger the wake-up detector. the wake input is provided with an internal pull-up and pull-down structur e and an internal wake pulse filter (see figure 8 ). figure 8 block diagram of the wake input depending on the signal at the wake input, either the pull-up structure or the pull-down structure is connected to the wake input. while a voltage uv wake >ubdwake thr is applied to the wake input, the internal pull-up structure is connected to the wa ke input. conversely, while a voltage u v wake data sheet 29 rev. 1.3, 2015-09-21 tle9221sx wake-up detector in low power modes or in the bd_g otosleep command an active wake- up flag is indicated at the rxd and rxen output within the time period dbdwakeupreaction local (see table 5 ). in case the transceiver is in bd_sleep mode, an active wake-up fl ag also triggers a mode change to bd_standby mode (for details see table 17 ). a local wake-up signal can be detected by the tle9221sx only if the power supply u v bat is available. the detection of a local wake-up is workin g over the whole operating range of u v bat (for details see table 20 ). the errn output indicates the wake -up event after the time dbdwake local : dbdwake local = dbdwakepulsefilter + dbdwakeupreactio n local 7.1.2 local wake-up rising edge the wake input on the tle9221sx is a bi-sensitive inpu t and also a rising edge (signal change from gnd to u v bat ) at the pin wake is detected as a wake-up event (see figure 11 ). as on a local wake-up, triggered by a falling edge at the input pin wake, a rising edge also sets the local wake- up bit and the wake-up flag respectively. the internal state machine does not differentiate betw een a local wake-up triggered by a rising edge and a falling edge at the pin wake. there is no possibility of distinguishing betw een the rising and falling edge, since only one sir entry is available. figure 11 local wake-up rising edge 7.2 remote wake-up for a remote wake-up, also called bus wake-up, a dedica ted wake-up pattern is defined in flexray systems. a wake-up pattern consists of at leas t two wake-up symbols. a wake-up symbol on the flexray bus is defined as a phase of ?data_0? followed by a ph ase of ?idle? or alternatively a phase of ?data_0? followed by a phase of ?data_1?. bus wake-up patterns are detected by the wake -up detector and fed to th e internal state machine. the remote wake-up bit (bit 1) in the sir is set, if the tle9221sx detects a remo te wake-up event in a low power mode or during the bd_gotosleep command, re gardless of whether the wa ke-up was triggered by a standard wake-up pattern or triggered by an alternativ e wake-up pattern or by a wake-up signal via payload. t dbdwakepulsefilter wake dbdwakeupreaction local t rxd rxen bd_sleep bd_standby wake-up detection set local wake-up bit ubdwake thr 100% uv bat data sheet 30 rev. 1.3, 2015-09-21 tle9221sx wake-up detector at the same time that it sets the remote wake-up bit, the tle9221sx also sets the wake-up flag and the wake- up source bit. in non-low power modes, the detection of a remote wake-up event is ignored and neither the remote wake-up bit nor the wake-up flag is set. in low power modes or in the bd_gotosleep command, an active wake-up flag is indicated at the rxd and rxen outputs within the time period dbdwakeupreaction remote (see figure 12 and table 5 ). in case the transceiver remains in bd_sleep mode an active wake -up flag also triggers a mode change to bd_standby mode (for details see table 20 ). to detect a remote wake-up event, at least one of the two power supplies needs to be available. 7.2.1 standard wake-up pattern the standard wake-up pattern is defined by at least tw o wake-up symbols starting with ?data_0?, followed by an ?idle? signal. the pulse width for the ?data_0? needs to be at least t = dwu 0detect or longer. the pulse width for the ?idle? phase sh all not be below t = dw u idledetect . the maximum time for th e standard wake-up pattern shall not exceed t = dw u timeout (see figure 12 ). the pulse width for ?data_0? may vary between the two wake- up symbols as long as the pulse width is not below t = dwu 0 detect and the standard wake-up pattern does not exceed t = dw u timeout . variation of the pulse width of the ?idle? phas e is possible with the same limitations. the standard wake-up pattern is independ ent of the data transmission rate. the wake-up detector of the tle9221s x distinguishes between ?data_0? an d ?idle? by the differential bus voltage. the bus voltage below the threshold udata0_lp is identified as a ?data_0? signal and the bus voltage above the threshold udata0_lp is identi fied as an ?idle? or a ?data_1? signal. the wake-up detector does not differentiate between an ?idl e? or a ?data_1? signal. figure 12 standard wake-up pattern wake-up symbol data_0 ubus wake-up symbol wake-up pattern t dwu 0detect dwu timeout dwu idledetect dwu 0detect data_0 udata0_lp idle wake-up detection set remote wake-up bit rxd rxen bd_sleep bd_standby t idle idle dwu idledetect dbdwakeupreaction remote data sheet 31 rev. 1.3, 2015-09-21 tle9221sx wake-up detector 7.2.2 alternative wake-up pattern the definition of the alternative wake -up pattern is similar to that of the standard wake-up pattern, the only difference is that the wake-up symbols have no ?idle? si gnal. the ?idle? signal is replaced by a ?data_1? signal (see figure 13 ). the timing requirements for pulse width and ti me-out are the same as for the standard wake- up pattern. the alternative wake-up pattern is also independent of the data rate. figure 13 alternative wake-up pattern 7.2.3 wake-up by payload besides sending a dedicated wake-up pa ttern on the flexray bus, it is a lso possible to wake up the tle9221sx with a wake-up message hidden in th e data field of the standard flexra y frame, called wake-up by payload. in comparison to the wake-up by stan dard pattern or to the wake-up with an alternative pattern, the wake-up by payload is limited to a data transmission rate of 10 mbit/s. a dedicated byte start sequence is transmitted before each byte of the payload within the flexray data frame.the byte start sequence (bss) co nsists of one ?high? bit followed by one ?low? bit. to transmit a ?data_0? byte to the flexray bus, the flexray controller se nds 10 bits. first a ?high? bit as part of the byte start sequence, followed by a ?low? bit which also belongs to the byte start sequence and after the byte start sequence, the controller sends eight ?low? bits (hl= bss; llllllll= ?dat a_0?). sending a ?data_1? byte the flexray controller sends a ?high? bit followed by a ?low? bit and then send s eight consecutive ?high? bits (hl= bss; hhhhhhhh= ?data_1?) (see figure 14 ). at a data rate of 10 mbit/s, one bit in the flexray data frame has a bit length of 100 ns. this means that each data byte in a wake-up patt ern has one glitch of 100 ns. the wake-up detector of tle9221sx has an analog input filter implemented, which fi lters out the glitches on the wake-up pattern for glitches shorter than t = dw u interrupt . receiving a complete wake-up by pa yload, the tle9221sx sets the remote wake-up bit, the wake-up flag and also the wake-up source bit. the wake-up flag is set in ca se the following da ta pattern is detected in a flexray frame. wake-up symbol data_0 ubus wake-up symbol wake-up pattern t dwu 0detect dwu timeout dwu idledetect dwu 0detect data_0 udata0_lp idle wake-up detection set remote wake-up bit rxd rxen bd_sleep bd_standby t data_1 data_1 dwu idledetect dbdwakeupreaction remote data sheet 32 rev. 1.3, 2015-09-21 tle9221sx wake-up detector in case any incomplete wake-up pattern is received, no wake-up flag is se t and no entry is made to the sir. figure 14 wake-up by payload 7.3 wake-up flag and wake-up bits the wake-up flag and the sir latch th e wake-up event and allow an external microcontroller to read out the wake-up source. the tle9221sx pr ovides three bits in the si r for the wake-up information: ? the local wake-up bit (bit 0) ? the remote wake-up bit (bit 1) ? the wake-up source bit (bit 12) even if the wake-up detector is acti ve in every operation mode, the wake-up bits can only be set in low power mode or in the bd_gotosleep co mmand. in every other operation mo de no wake-up bit is set (see table 11 ). the local wake-up bit is set in case the tle9221sx detect s a local wake-up event and in case of a remote wake- up event the remote wake-up bit is set. a remote wake-up can be a wake -up either by a standard pattern, a wake-up by an alternative pattern or a wake-up by payload. in case the tle9221sx detects a local and a remote wake -up event, both entries in the sir bits are set. table 10 wake-up payload content 0xff 0xff 0xff 0xff 0xff 0x00 0x00 0x00 0x00 0x00 0xff 0xff 0xff 0xff 0xff 0x00 0x00 0x00 0x00 0x00 0xff 0xff 0xff 0xff 0xff 0x00 0x00 0x00 0x00 0x00 0xff 0xff 0xff 0xff 0xff 0xff ubus wake-up symbol wake-up symbol wake-up pattern t dwu 0detect dwu timeout data_1 data_0 data_0 data_1 dwu idledetect dwu 0detect dwu interrupt dwu idledetect udata0_lp data sheet 33 rev. 1.3, 2015-09-21 tle9221sx wake-up detector concurrent with the local wake-up bit or with the remo te wake-up bit, the wake- up source bit and the wake- up flag are set. the wake-up source bit is ?high? wh en detecting a local wake-up event and ?low? when a remote wake-up event is detected. only the first wake-up event is indicated in the wa ke-up source bit. in case the tle9221sx detects a local and a remote wake-up ev ent simultaneously, the wa ke-up source bit output indicates the remote wake-up event. the sir is reset either after a complete read-out of the sir (see chapter 6.2.3 ) or when the tle9221sx enters into bd_normal mode. the wake-up flag is reset if both bits, the local wa ke-up bit and the remote wake-up bit are reset. the wake-up flag and the wake-up source bit are indicate d at the errn output pin of the host interface (see table 9 ). table 11 setting the wake-up flag and the wake-up bits modes of operation wake-up event local wake-up bit 1) 1) not set = logical ?high?, set = logical ?low? remote wake-up bit 1) wake-up source bit 1) wake-up flag 1) bd_gotosleep remote ?high? ?low? ?low? ?low? local ?low? ?high? ?high? ?low? bd_standby remote ?high? ?low? ?low? ?low? local ?low? ?high? ?high? ?low? bd_sleep remote ?high? ?low? ?low? ?low? local ?low? ?high? ?high? ?low? data sheet 34 rev. 1.3, 2015-09-21 tle9221sx power supply interface 8 power supply interface the power supply interface distributes the correct vo ltages to the single function blocks within the tle9221sx. it manages the power-up and power-down procedures, monitors the supply voltages uv bat , uv cc and also the reference voltage uv io . to control external circuitry, an inh output is available (see figure 16 ). figure 15 block diagram of power supply interface the central state machine is the main logic control unit of the tle9221sx. all functions, including operation mode management, the diagnostic function and fail ure management are controlled and handled by the central state machine. to ensure correct failure mana gement, the central state ma chine is the first function block which is powered up and the last function bloc k which is powered down. for this reason, the central state machine is supplied by an internal supply uv in (see figure 15 ). the internal supply uv in is in its operational range, if at least one of the two power supplies, uv cc or uv bat , is above their power-down threshold, ubdbpv bat or uvbdpdv cc . note: the reference voltage uv io is the level shift supply for all digital inputs and outputs. it is not connected with the internal supply of the central state ma chine. nevertheless, if the reference voltage uv io is not available or in undervoltage condition, the inte rnal state machine blocks all host commands and changes the mode of operation to a low power mode. host interface communication controller interface bus guardian interface voltage monitor internal supply central state machine v bat v cc v io v in inh driver data sheet 35 rev. 1.3, 2015-09-21 tle9221sx power supply interface 8.1 inh output the inh output signal is intended to control an external voltage regu lator. when the flexray transceiver tle9221sx is in bd_sleep mode, the inh output is open and floating. in every ot her operation mode the inh output voltage is uinh1 not-sleep . the voltage uinh1 not-sleep is derived from the power supply uv bat by an internal open drain transistor (see figure 16 ). the transceiver tle9221sx signals ?sleep? at the inh pin, while the device is in bd_sleep mode and ?not_sleep? in any other mode of operation (bd_standby, bd_normal, bd_receiveonly and the bd_gotosleep command). figure 16 circuit diagram of the inh output 8.2 bd_off and undervoltage the flexray transceiver tle9221sx mo nitors the two power supplies uv cc and uv bat and also the reference voltage uv io . in case one of the three voltages falls below it s dedicated undervoltage detection threshold, the tle9221sx changes its mode of op eration to low power mode (see figure 17 ). for undervoltage condition, the central state machine is still functional. v bat (11) inh state machine (1) uv bat uinh1 not_sleep t u not_sleep (bd_sleep) (bd_normal) (bd_receiveonly) (bd_standby) (bd_gotosleep) sleep 1) 1) the inh output is usually floating. to achive a low signal on the inh output an external load is required. data sheet 36 rev. 1.3, 2015-09-21 tle9221sx power supply interface figure 17 logic diagram of undervoltage detection the bd_off state of the flexray transceiver tl e9221sx is reached, if both power supplies, uv bat and uv cc are below the power-down thresholds ubdpdv bat and ubdpdv cc . in comparison to undervoltage detection the reference supply uv io has no effect on the bd_off st ate. regardless of whether the uv io voltage is available or not, the flexray transceive r tle9221sx always changes over to the power-down state bd_off in case uv bat and uv cc are not present (see figure 18 ). 1 block host commands delay line low power mode uv bat uv cc uv io ubduvv bat uuv io ubduvv cc + - + - + - data sheet 37 rev. 1.3, 2015-09-21 tle9221sx power supply interface figure 18 logic diagram of bd_off detection note: when the transceiver tle9221sx is in bd_off state, the central st ate machine is powered down. all registers in tle9221sx are built of volatile memory and therefore, al l status, diagnostic, and failure information is reset. 8.3 undervoltage events 8.3.1 undervoltage flags and undervoltage bits detected undervoltage events are st ored using a dedicated undervoltage bit and they are visible in the sir. along with the undervoltage bit a summa ry bit, the error bit (bit 11), is set. the error bit is indicated at the errn output, depending on the selected operation mode (see table 9 and the example in figure 19 ). the tle9221sx provides three bits in th e sir to signal un dervoltage events: ?uv bat undervoltage bit (bit 8) ?uv cc undervoltage bit (bit 9) ?uv io undervoltage bit (bit 10) undervoltage bits are used to store the information for further use. ther efore undervoltage bits get cleared only by a power-down or by clearing the sir (see chapter 6.2.3 ). in comparison to the undervoltage bi ts, undervoltage flags are not latched and they are only used to trigger the changes of the operation mode. underv oltage flags are not visible externally. an undervoltage event on any supply line directly sets the dedicated undervoltage bit and also the error bit. the undervoltage flags are set by internal timers. an internal undervoltage detect ion timer is available for every supply, uv bat , uv cc and uv io . while setting the undervol tage bit, the appropriate undervoltage detection timer is also triggered. when the undervoltage detectio n timer expires, while the undervoltage event is still present, the undervolta ge flag is set (see figure 19 ). & bd_off uv bat ubdpdv bat uv cc ubdpdv cc + - + - data sheet 38 rev. 1.3, 2015-09-21 tle9221sx power supply interface in case the undervoltage situation gets cleared while the undervoltage detection timer is running, the tle9221sx does not set the undervoltage flag. according to the mode chan ge table, an active undervoltage flag changes the mode of operation to low power mode (see and table 16 ). figure 19 example of setting the undervoltage flag besides the undervoltage detection timer, each supply is also equipped with an undervoltage recovery timer. the undervoltage recovery timer starts when the external power supply recovers. when the undervoltage recovery timer expires, the un dervoltage flag gets reset (see figure 19 ). if the external power supply recovers only temporarily and the supply line falls back to the undervoltage situ ation while the undervoltage recovery timer is still running, the undervoltage flag remains set. clearing the unde rvoltage flag allows the transceiver tle9221sx to return from low power mode to the previo us operational mode select ed by the host command (see chapter 9.4 and table 17 ). note: undervoltage bits are set by an undervoltage even t. undervoltage bits are stored in the sir and also indicated at the errn output. undervoltage flags are set by the undervoltage detection timer. undervoltage flags are not visible in the sir and they are not indicated at the errn output. un dervoltage flags are only used to change the mode of operation after the undervolta ge detection timer has expired! 8.3.2 undervoltage event at uv bat the flexray transceiver tle9221sx considers a voltage fluctuation on the power supply uv bat , which falls below the detection threshold ubduvv bat and exceeds the blanking time dbduv bat_blk , as an undervoltage event. voltage fluctuations on uv bat shorter than dbduv bat_blk are ignored and not re cognized by the power uv bat t bd_normal dbduvv bat dbdrv bat t stbn t en set undervoltage flag bd_sleep bd_normal clear undervoltage flag t errn undervoltage detection timer undervoltage release timer dreactiontime errn set undervoltage bit set error bit dbduvv bat_blk data sheet 39 rev. 1.3, 2015-09-21 tle9221sx power supply interface supply interface. to indicate the unde rvoltage event on th e supply voltage uv bat , the uv bat undervoltage bit (bit 8) and the error bit (bit 11) are set (see figure 20 ). after the uv bat undervoltage detection timer dbduvv bat expires, the uv bat undervoltage flag is set and the mode of operation changes to bd_sleep mode. the host interface and the commu nication controller interfac e are active while the dbduvv bat undervoltage detection timer is running and the reference supply uv io is present. when the dbduvv bat undervoltage detection timer expires and the uv bat undervoltage flag is set, the ho st interface and the communication controller interface are blocked as long as the uv bat undervoltage flag remains active (compare also with chapter 9.3 and table 16 ). figure 20 undervoltage event at uv bat in non-low power mode 8.3.3 undervoltage event at uv cc power supply voltage fluctuations on the uv cc power supply, falling be low the threshold ubduvv cc for a time longer than the blanking time dbduvv cc_blk , are considered as undervoltage events. voltage fluctuations on uv cc shorter than the time dbduv cc_blk are ignored and not recognized by the power supply interface. detecting an undervoltage event on uv cc , the flexray transceive r tle9221sx sets the uv cc undervoltage bit (bit 9) and the error bit (bit 11) (see figure 21 ). after the uv cc undervoltage detection timer dbduvv cc expires, the uv cc undervoltage flag is set, the mode of operation changes to bd_standby mode. the host interface rema ins active while the uv cc undervoltage detection timer is running and the reference supply uv io is present. setting the uv cc undervoltage flag blocks the host interface and forces the mode of operation to bd_standby mo de (compare also with chapter 9.3 and table 16 ). while the power supply uv cc is in undervoltage condition, the tle9 221sx also disables the transmitter and sets the bus error bit (bit 4). uv bat t non-low power mode t < dbduvv bat_blk dbduvv bat_blk dbduvv bat dbdrv bat set uv bat undervoltage flag, block host commands clear uv bat undervoltage flag, release host commands (return to the mode of operation selected by the host command) bd_sleep ubduvv bat (threshold) dreactiontime errn t errn set uv bat undervoltage bit set error bit dbduvv bat_hys data sheet 40 rev. 1.3, 2015-09-21 tle9221sx power supply interface figure 21 undervoltage event at uv cc in non-low power mode 8.3.4 undervoltage event at uv io the central state machine of the tle9221sx handles an undervoltage event at the reference supply uv io in a manner identical to an undervoltage event on the power supply uv bat . the supply on the level shift input v io is the main reference for all digi tal inputs and outputs of the tle9221sx. it is also connected to the pad suppl y of the external microcontroller (see figure 44 ). an undervoltage event on the level shift input v io could lead to a misinterpretation of the digital input levels and could generate a false signal at the digital outputs. for fail-safe reasons, the tle9221sx bl ocks the host interface, the commu nication controller interface and the bus guardian interface after a sm all processing time (dreactiontime errn ) when an undervoltage event has been detected on the reference supply uv io (see figure 22 ). according to table 2 , all digital inputs are set to their default level. all digital outputs are set to logical ?low?. the transceiver tle9221sx detects an undervol tage event, if the supply at the pin v io drops for the time period t>dbduvv io_blk below the undervoltage detection threshold uuv io (see figure 22 ). voltage fluctuations on uv io shorter than dbduv cc_blk are ignored and not recognized by the power supply interface. although the host interface is blocked and the s ir is not accessible whil e the reference supply uv io is in undervoltage condition, th e transceiver sets the uv io undervoltage bit (bit 10) and the error bit (bit 11) (see figure 22 ). after the uv io undervoltage detection timer dbduvv io expires, the uv io undervoltage flag is set and the mode of operation changes to bd_sleep mode (compare also to chapter 9.3 and table 16 ). uv cc t non-low power mode t < dbduvv cc_blk dbduvv cc_blk dbduvv cc dbdrv cc set uv cc undervoltage flag, block host commands clear uv cc undervoltage flag, release host commands (return to the mode of operation selected by the host command) bd_standby ubduvv cc (threshold) dreactiontime errn t errn set uv cc undervoltage bit set error bit ubduvv cc_hys data sheet 41 rev. 1.3, 2015-09-21 tle9221sx power supply interface figure 22 undervoltage event at uv io in non-low power mode note: while the tle9221sx is in undervol tage condition at the reference supply uv io , all digital outputs are set to ?low?. the outputs do not reflect th e status of the tr ansceiver anymore. for example, wake-up events cannot be indicated at the errn, rxd, and rxen output anymore, since these outputs are set permanently to ?low?. 8.4 power-up and power-down 8.4.1 bd_off state bd_off state is reached, wh en the transceiver does not receive any supply. the transceiver tle9221sx is in bd_off state when the internal supply voltage uv in is turned off and the central state machine is powered down. when both power supplies, uv cc and uv bat fall below their power- down thresholds (ubdpdv bat and ubdpdv cc ), the internal supply is off and the bd_off state is reached (see figure 23 ). the status of the reference supply uv io has no influence on the powe r-down sequence of the flexray transceiver tle9221sx. when the flexray transceiver tle9221sx is in bd_off stat e, all outputs are logical ?low?, the transmitter and the receiver are turned off and the wake-up function s are not operational. if the reference supply uv io is available, the inputs are set to th eir default values (compare with table 2 ). uv io w q r q o r z s r z h u p r g h t < dbduvv io_blk dbduvv io_blk g % ' 5 9 , 2 % ' b 6 o h h s % ' b 6 w d q g e \ uuv io (threshold) set uv io undervoltage bit set error bit dbduvv io dbd modechange set uv io undervoltage flag clear uv io undervoltage flag, release host commands (return to the mode of operation selected by the host command) dreactiontime errn t errn set all output pins low set all input pins to default block all host commands uuv io_hys data sheet 42 rev. 1.3, 2015-09-21 tle9221sx power supply interface figure 23 power-down 8.4.2 power-up for the power-up, only the power supplies uv bat and uv cc are significant. as soon as at least one power supply is above its reset threshold the internal supply uv in is available and the central state machine gets powered up. the device tle9221sx enters into bd_standby mode within the time period dbd powerup as soon as the voltage values of the power supplies uv bat and uv cc are above their undervoltage detection threshold limits ubduvv bat and ubduvv cc (see figure 24 ). dbdpdv cc dbdpdv bat uv bat uv cc v t any operation mode bd_off uv io data sheet 43 rev. 1.3, 2015-09-21 tle9221sx power supply interface figure 24 power-up 8.4.3 interim bd_standby mode as a safety measure, the tle 9221sx provides an interim bd_stan dby mode. changeover to the interim_bd_standby mode takes place during an incomplete power-up procedure (see figure 25 ). in interim_bd_standby mode, the tle 9221sx provides the same functions as in bd_standby mode, except for the host commands. the host comm ands are blocked in interim bd_standby mode. therefore, a host command cannot be used to change the mode of the tle9221sx, while the power-up has not completed. with switching over to the interim bd_stand by mode, at least one undervoltage detection timer is started. in case the power-up is completed before the undervoltage detection timer expires, the tle9221sx changes the mode of operation to bd_standby mo de. in case the undervoltage detect ion timer expires before the power- up is completed, the undervoltage flag is set depending on which power supply is missing, and the mode of operation changes to low power mode (compare with chapter 9.3 ). uv bat uv cc v t uv io dbd powerup powering up the central state machine bd_off interim_bd_standby bd_standby ubduv bat ubdpd bat ubduvv cc host interface blocked host interface released data sheet 44 rev. 1.3, 2015-09-21 tle9221sx power supply interface figure 25 changing over to interim_bd_standby mode power-up uv bat > ubduvv bat and uv cc > ubduvv cc uv bat < ubduvv bat or uv cc < ubduvv cc bd_standby (host commands released!) interim bd_standby set uv cc undervoltage flag t > dbduvv cc 1) t < dbduvv bat and uv bat > ubduvv bat and t < dbduvv cc and uv cc > ubduvv cc set uv bat undervoltage flag bd_sleep 1) uv bat undervoltage overrules uv cc undervoltage t > dbduvv bat 1) host command: en=0, stbn=0, bd_standby mode bd_standby (host commands blocked!) uv cc > ubduvv cc uv bat > ubduvv bat data sheet 45 rev. 1.3, 2015-09-21 tle9221sx operating mode description 9 operating mode description the flexray transceiver tle9221sx prov ides several different operating modes. the four main operating modes are implemented to handle the requirements of a flexray ecu. two product-sp ecific interim operation modes are implemented to guarantee secure mode chan ges even under failure conditions. the bd_off state describes the behavior of the tle9221s x, while it is not supplied (see table 12 ). 9.1 operating mode transitions overview depending on the currently selected operating mode, se veral events can trigger a change of the operating mode. the options are: ? a valid host command at the host interface. ? setting an undervoltage flag, either for the power supplies uv bat and uv cc or for the reference voltage uv io . ? recovery from an undervoltage even t, either for the power supplies uv bat and uv cc or for the reference voltage uv io . ? wake-up detection either on the flexra y bus or on the local wake-input wake. ? a power-up event at the power supplies uv bat and uv cc. it is not possible to change over to every operating mode by a trigge r event. there are limitations and dependencies (see table 13 ). table 12 operating modes overview modes of operation description clustering operating mode bd_normal normal operating mode to transmit data to the bus and receive data from the bus. non-low power mode bd_receiveonly the tle9221sx can rece ive data from the bus, but the transmitter is blocked. non-low power mode bd_standby transmitter and receiver are turned off, the diagnostic functions and wake-up de tection are available. low power mode bd_sleep all functions, except the wake-u p detection are turned off. low power mode product-specific operating modes bd_gotosleep transition mode to change over to the bd_sleep mode via a host command. interim mode interim_bd_standby transition mode, to whic h a changeover is made only after an incomplete power-up interim mode power-down bd_off state of the tle9221sx when no su pply is fed to it power-down state data sheet 46 rev. 1.3, 2015-09-21 tle9221sx operating mode description 9.2 operating mode change by host command changeover can be made to every operation mode, ex cept the bd_sleep mode by a valid host command, when no undervoltage flag is set. changeover to bd_sleep mode can be made only via the bd_gotosleep command (see figure 26 and table 14 ). table 13 options for changeover to various operating modes target mode trigger event fo r the mode change limitation bd_normal changeover to bd_nor mal mode can be made only by a valid host command. host commands are blocked if any undervoltage flag is set. bd_receiveonly changeover to bd_r eceiveonly mode can be made only by a valid host command. host commands are blocked if any undervoltage flag is set. bd_standby changeover to bd_standby mode can be made by: ? a valid host command ? an undervoltage event at uv cc ? a wake-up event ? a power-up event at uv cc and uv bat changeover to bd_standby mode cannot be made from bd_sleep mode via host command (see figure 26 ). host commands are blocked if any undervoltage flag is set. bd_sleep changeover to bd_sleep mode can be made by: ? a valid host command ? an undervoltage event at uv io or uv bat changeover to bd_sleep mode by a host command is possible only via the bd_gotosleep command (see figure 26 ). host commands are blocked if any undervoltage flag is set. bd_gotosleep changeover to bd _gotosleep command can only be made by a valid host command. the bd_gotosleep command can not be executed while the wake-up flag is active (see table 14 ). host commands are blocked if any undervoltage flag is set. interim_bd_standby changeover to interim_bd_standby mode takes place only after an incomplete power-up. ? bd_off changeover to bd_off co ndition takes place if the power supplies uv bat and uv cc are below their reset thresholds. ? data sheet 47 rev. 1.3, 2015-09-21 tle9221sx operating mode description figure 26 operating mode change by host command en stbn l l inh not_sleep bd_standby en stbn lx inh sleep bd_sleep en stbn l h inh not_sleep bd_receiveonly en stbn h h inh bd_normal 1 bd_gotosleep en stbn lh inh not_sleep 4 2 3 17 5 6 8 7 11 9 10 12 13 14 15 16 18 19 21 20 not_sleep tle9221sx operating mode description data sheet 48 rev. 1.3, 2015-09-21 table 14 mode changes by host command 1) 2) 3) 4) no. primary operating mode stbn en wake-up flag uv bat flag uv io flag uv cc flag secondary operating mode errn 5) rxd 6) rxen 6) inh remarks bd_normal mode 1bd_normal h set ?l? hhhh 1 => bd_receiveonly h fb fb not_sleep 7) 2bd_normal set ?l? hh hhh 1 => bd_gotosleep h 1 => h 1 => h not_sleep 7) 3bd_normal set ?l? set ?l? hhhh 1 => bd_standby h 1 => h 1 => h not_sleep 7) bd_receiveonly mode 4bd_receiveonlyh set ?h? 2 => h hhh 1 => bd_normal 2 => h fb fb not_sleep 7) 5bd_receiveonly set ?l? lh hhh 1 => bd_standby h 1 => h 1 => h not_sleep 7) 6bd_receiveonly set ?l? ll hhh 1 => bd_standby 1 => l 1 => l 1 => l not_sleep 8) 7bd_receiveonly set ?l? set ?h? hhhh 1 => bd_gotosleep h 1 => h 1 => h not_sleep 9) 8bd_receiveonly set ?l? set ?h? lhhh 1 => bd_standby 1 => l 1 => l 1 => l not_sleep 8) , 10) bd_gotosleep command 9 bd_gotosleep set ?h? h 2 => h hhh 1 => bd_normal 2 => h 1=>fb 1=>fb not_sleep 9) , 11) 10 bd_gotosleep l set ?l? hhhh 1 => bd_standby hhhnot_sleep 9) , 11) 11 bd_gotosleep set ?h? set ?l? hhhh 1 => bd_receiveonly h 1=>fb 1=>fb not_sleep 9) , 11) 12 bd_gotosleep l h h h h h 1 => bd_sleep hhh 1 => sleep 9) , 11) bd_standby 13 bd_standby l set ?h? hhhh 1 => bd_gotosleep hhhnot_sleep 9) 14 bd_standby l set ?h? lhhh bd_standby lllnot_sleep 10) 15 bd_standby set ?h? l h h h h 1 => bd_receiveonly h 1=>fb 1=>fb not_sleep ? 16 bd_standby set ?h? l l h h h 1 => bd_receiveonly 1 => h/l 1=>fb 1=>fb not_sleep 12) 17 bd_standby set ?h? set ?h? 2 => h hhh 1 => bd_normal 2=> h 1=>fb 1=>fb not_sleep 7) bd_sleep 18 bd_sleep l set ?h? hhhh bd_sleep hhhsleep 13) , 14) 19 bd_sleep l set ?l? hhhh bd_sleep hhhsleep 13) , 14) tle9221sx operating mode description data sheet 49 rev. 1.3, 2015-09-21 20 bd_sleep set ?h? set ?h? 2 => h hhh 1 => bd_normal 2 => h 1=>fb 1=>fb 1 => not_sleep 7) , 14) 21 bd_sleep set ?h? set ?l? hhhh 1 => bd_receiveonly h 1=>fb 1=>fb 1 => not_sleep 14) 1) the table describes the states and signals of flags, operating modes and output pins. this tabl e does not contain any timing information. time for mode changes or the response time of the digital outputs are specified in the electrical characteristics (compare with table 22 ). 2) all flags are ?low? active. ?l? mean s the flag is set. ?x? = ?don?t care?. the color red stands for the event wh ich triggered the mode transition. for example: set ?l? or set ?h?. the color blue stands for the consequence of the trigger event. the numbers, ?1 =>?, ?2 =>? indicate the order of the consequences. for example: ?1=> bd_normal? means the transceive r tle9221sx changes over to bd_normal mode. ?2=> h? means the flag is cleared after the tle9221sx has changed over to bd_normal mode. ?fb? stands for ?follow bus? and me ans that depending on the signal on the flexray bus, the pins rxd and rxen can either be ?hi gh? or ?low?. 3) the wake-up flag stands for a detected wake-up event (compare with chapter 7.3 and table 10 ). the uv bat flag is the same as the uv bat undervoltage flag, which is set after the uv bat undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv io flag is the same as the uv io undervoltage flag, wh ich is set after the uv io undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv cc flag is the same as the uv cc undervoltage flag, which is set after the uv cc undervoltage detection ti mer expires (compare with chapter 8.3.1 ). 4) the errn output indicates the wake-up flag, the wa ke-up source bit and the error bit (compare with table 9 ). the error bit is set only by the undervoltage bits, such as the uv bat undervoltage bit (bit 8), the uv cc undervoltage bit (bit 9) and the uv io undervoltage bit (bit 10). all other possible sources sett ing the error bit, such as, for example a bus failure or an overtemperature event, are cons idered as not set in this table. 5) the signal at the errn output pin depends on the host command applied and no t on the current operating mode (compare with chapter 6.3 ). 6) the signals at the rxd and rxen outputs de pend on the current operatio n mode, and are independent of the host command applied (compare with table 5 ). 7) while tle9221sx changes over to bd_normal mode, the wake-up fl ag is cleared. moreover, the wa ke-up flag cannot be set in non- low power mode, and therefore the wake-up flag is always ?high? in bd_normal mode (see chapter 7.3 ). 8) the wake-up flag was set during a previous wake-u p event while the tle9221sx was in low power mode. 9) the interim mode will automatically be left to bd_sleep when the timer dbd sleep expires. if the host command does not change within the time dbd sleep, the tle9221sx changes over by default to bd_sleep mode (see chapter 9.2.1 ). 10) the bd_gotosleep command cannot be executed while the wake-up flag is active (see figure 28 ). the tle9221sx changes over directly to bd_standby mode. 11) since the bd_gotosleep command can be executed only when the wake-up flag is cleared, the wake-up flag is always ?high? whil e the tle9221sx executes the bd_gotosleep command. 12) if the host command bd_receiveonly mode is applied, the errn output indicates th e wake-up source bit (see table 9 ). table 14 mode changes by host command 1) 2) 3) 4) no. primary operating mode stbn en wake-up flag uv bat flag uv io flag uv cc flag secondary operating mode errn 5) rxd 6) rxen 6) inh remarks tle9221sx operating mode description data sheet 50 rev. 1.3, 2015-09-21 13) the en input pin of the host interface is disabled in bd _sleep mode, as long the stbn input pin remains ?low? (see chapter 9.2.2 ). 14) a wake-up event would change the operation mode from bd_sleep to bd_standby, therefore, the wake-up flag is always ?high? wh ile the tle9221sx remains in bd_sleep mode. data sheet 51 rev. 1.3, 2015-09-21 tle9221sx operating mode description 9.2.1 entering bd_sleep mode via the bd_gotosleep command the bd_gotosleep command can be executed from every non-low powe r mode and from bd_standby mode by applying the host command stbn = ?l? and en = ? h?. the bd_gotosleep command cannot be executed from bd_sleep mode (see figure 26 ). when the transceiver tle9221sx recognizes the host command bd_gotosleep, the tle9221sx changes over to the interim mode ?bd_gotosleep co mmand? and starts an internal time r. in case the en input and the stbn input remain unchanged during the bd_sleep mode detection window (t = dbd sleep ), the operating mode automatically changes over to bd_sleep mode. the time for the mode change, dbd modechange , is defined as the time interval between appl ying the host command and changing over to bd_sleep mode (see figure 27 ). figure 27 entering bd_sleep mode the bd_gotosleep command can be executed only when the wake-up flag is cleared. when the wake-up flag is cleared, the output pins rxd and rxen are set to logical ?high? in bd_sleep mode and also during the execution of the ?bd_ gotosleep command?. in case the changeover to bd_sleep mode is made by a host command, the en input is disabled in bd_sleep mode (see figure 26 , figure 27 and table 14 ). applying the bd_gotosleep host co mmand to the tle9221sx, while the wa ke-up flag is ac tive, changes the operating mode directly to bd_standby mode. the rx d and rxen outputs are set to ?low? and indicate a previous wake-up event (see figure 28 and table 14 ). en stbn inh bd_gotosleep command t t t = dbdlogic filter host command detection bd_sleep mode t = dbd sleep dont care bd_normal mode t rxd t rxen follow bus t = dbd modechange t errn all wake-up bits and the error bit are cleared, therefore the errn, rxd and rxen outputs are high data sheet 52 rev. 1.3, 2015-09-21 tle9221sx operating mode description figure 28 changing over to bd_standby, with an active wake-up flag 9.2.2 quitting bd_sleep by host command changeover to bd_sleep mode can be made by a host command or by an undervoltage event. in case changeover to bd_sleep was made by a host command via the bd_gotosleep command, the en input pin gets disabled when the tle9221sx changes over to bd_sleep mode. as long as the stbn input pin remains at logical ?low?, any signal change at the en input is ignored and does not trigger any mode change. signal change at the st bn input pin enables the en input as well and a mode change is possible. via a host command, bd_sleep mode can only change to bd_normal mode or to bd_receiveonly mode (see figure 26 and table 14 ). 9.3 operating mode changeover by undervoltage flag besides a valid host command, any changeovers in the op erating mode may also be triggered by setting the undervoltage flag after the undervoltage detection timer has expired (compare with chapter 8.3.1 ). setting the uv io or the uv bat undervoltage flag changes the mode of operation to bd_sleep, and setting the uv cc undervoltage flag changes the mo de of operation to bd_standby. if the transceiver tle9221sx changes over to bd_sleep mode by setting the uv io or uv bat undervoltage flag, the en input pin remains acti ve even in bd_sleep mode. en stbn inh mode transition t t t = dbdlogic filter host command detection bd_standby mode dont care bd_receiveonly mode t rxd t rxen follow bus t = dbd modechange data sheet 53 rev. 1.3, 2015-09-21 tle9221sx operating mode description in case any undervoltage flag be comes active, while the flexray tran sceiver tle9221sx is executing the bd_gotosleep command, the mo de of operation changes directly to bd_sleep (see table 15 and figure 29 ). setting the undervoltage flag does not cause any change in the operating mode, if the transceiver is already in bd_sleep mode. figure 29 operating mode ch anges by undervoltage flag en stbn lh inh sleep bd_sleep en stbn h h inh bd_normal bd_gotosleep en stbn lh inh not_sleep 24 38 39 not_sleep en stbn l l inh not_sleep bd_standby 40 31 32 30 33 34 35 36 en stbn l h inh not_sleep bd_receiveonly 25 26 27 28 22 23 37 bd_off uv bat > ubduvv bat and uv cc > ubduvv cc 29 tle9221sx operating mode description data sheet 54 rev. 1.3, 2015-09-21 table 15 mode changes by setting the undervoltage flags 1) 2) 3) 4) no. primary operating mode stbn en wake-up flag uv bat flag uv io flag uv cc flag secondary operating mode errn 5) rxd 6) rxen 6) inh remarks bd_normal mode 22bd_normalhhh set ?l? hx 1 => bd_sleep 1 => l 1 => h 1 => h 1 => sleep 7) , 8) 23bd_normalxxh x set ?l? x 2 => bd_sleep 1 => l 1 => l 1 => l 2 => sleep 7) , 9) , 10) 24bd_normalhhh hh set ?l? 1 => bd_standby 1 => l 1 => h 1 => h not_sleep 7) bd_receiveonly mode 25 bd_receiveonly h l h set ?l? hx 1 => bd_sleep 1 => l 1 => h 1 => h 1 => sleep 8) 26 bd_receiveonly h l l set ?l? hx 1 => bd_sleep h/l 1 => l 1 => l 1 => sleep 8) , 11) , 12) 27bd_receiveonlyxxx x set ?l? x 2 => bd_sleep 1 => l 1 => l 1 => l 2 => sleep 9) , 10) 28 bd_receiveonly h l h h h set ?l? 1 => bd_standby 1 => l 1 => h 1 => h not_sleep ? 29 bd_receiveonly h l l h h set ?l? 1 => bd_standby h/l 1 => l 1 => l not_sleep 11) , 12) bd_gotosleep command 30 bd_gotosleep l h h set ?l? xx 1 => bd_sleep hhh 1 => sleep 8) , 13) , 14) 31 bd_gotosleep x x h x set ?l? x 1 => bd_sleep 1 => l 1 => l 1 => l 1 => sleep 9) , 13) , 14) 32 bd_gotosleep l h h x x set ?l? 1 => bd_sleep hhh 1 => sleep 13) , 14) bd_standby 33bd_standbyllh set ?l? hx 1 => bd_sleep hhh 1 => sleep 8) , 34bd_standbylll set ?l? hx 1 => bd_sleep lll 1 => sleep 8) , 11) 35bd_standbyxxx x set ?l? x 1 => bd_sleep 1 => l 1 => l 1 => l 1 => sleep 9) 36bd_standbyllh hh set ?l? 1 => bd_standby hhhnot_sleep? 37bd_standbylll hh set ?l? 1 => bd_standby lllnot_sleep 11) bd_sleep 38 bd_sleep l x h set ?l? xx 1 => bd_sleep hhhsleep 8) , 39 bd_sleep x x h x set ?l? x 1 => bd_sleep hhhsleep 9) 40 bd_sleep l x h x x set ?l? 1 => bd_sleep hhhsleep ? tle9221sx operating mode description data sheet 55 rev. 1.3, 2015-09-21 1) the table describes the states and signal s of flags, operating modes an d output pins. this table do es not contain any timing information. time for mode changes or the response time of the digital outputs are specified in the electrical characteristics (compare with table 22 ). 2) all flags are ?low? active. ?l? mean s the flag is set. ?x? = ?don?t care?. the color red stands for the event wh ich triggered the mode transition. for example: set ?l? or set ?h?. the color blue stands for the consequence of the trigger event. the numbers, ?1 =>?, ?2 =>? indicate the order of the consequences. for example: ?1=> bd_normal? means the transceive r tle9221sx changes over to bd_normal mode. ?2=> h? means the flag is cleared after the tle9221sx has changed over to bd_normal mode. ?fb? stands for ?follow bus? and me ans that depending on the signal on the flexray bus, the pins rxd and rxen can either be ?hi gh? or ?low?. 3) the wake-up flag stands for a detected wake-up event (compare with chapter 7.3 and table 10 ). the uv bat flag is the same as the uv bat undervoltage flag, which is set after the uv bat undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv io flag is the same as the uv io undervoltage flag, wh ich is set after the uv io undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv cc flag is the same as the uv cc undervoltage flag, which is set after the uv cc undervoltage detection ti mer expires (compare with chapter 8.3.1 ). 4) the errn output indicates the wake-up flag, the wa ke-up source bit and the error bit (compare with table 9 ). the error bit is set only by the undervoltage bits, such as the uv bat undervoltage bit (bit 8), the uv cc undervoltage bit (bit 9) and the uv io undervoltage bit (bit 10). all other po ssible sources setting the error bit, such as, for example a bus failure or an overtemperature event, are cons idered as not set in this table. 5) the signal at the errn output pin depends on the host command applied and no t on the current operating mode (compare with chapter 6.3 ). 6) the signals at the rxd and rxen outputs de pend on the current operatio n mode, and are independent of the host command applied (compare with table 5 ). 7) while tle9221sx changes over to bd_normal mode, the wake-up flag is cleared. moreov er, the wake-up flag cannot be set in non- low power mode, and therefore the wake-up flag is always ?high? in bd_normal mode (see chapter 7.3 ). 8) the uv bat undervoltage fl ag overrules the uv cc undervoltage flag (see chapter 9.3.1 ). 9) an undervoltage event at uv io blocks the host interface at once and sets all outputs to logical ?low? (see chapter 8.3.4 and figure 22 ). the transceiver tle9221sx can not indicate the error bit and the wake-up flag. 10) the uv io undervoltage fl ag overrules the uv cc undervoltage flag (see chapter 9.3.1 ). 11) the wake-up flag was set during a previous wake-u p event while the tle9221sx was in low power mode. 12) if the host command bd_receiveonly mode is applied, the errn indicates the wake-up source bit (see table 9 ). 13) since the bd_gotosleep command can be executed only when the wake-up flag is cleared, the wake-up flag is always ?high? whil e the tle9221sx executes the bd_gotosleep command. 14) the bd_gotosleep command is considered as low power mode and the errn indicates the wake-up flag just as in the bd_sleep or bd_standby mode (see table 9 ). data sheet 56 rev. 1.3, 2015-09-21 tle9221sx operating mode description 9.3.1 priorities of undervoltage events even if there are undervoltage ev ents on both power supplies uv bat and uv cc , together with an undervoltage event on the reference supply uv io , the central state machine is operating and handles the undervoltage events. an undervoltage event on uv io blocks the host interface at once and interrupts the communication before the uv io undervoltage timer expires. when the uv io undervoltage timer expires, the tle9221sx changes the mode of operation to bd_sleep. in case the uv cc undervoltage flag is set, the uv io undervoltage flag overrules the uv cc undervoltage flag. if the uv cc undervoltage flag was set before the uv io undervoltage flag, the mode of operation changes from bd_standby to bd_sleep mode. if the uv io undervoltage flag was set before the uv cc undervoltage flag, the mode of operation remains in bd_sleep mode. during an uv bat undervoltage event, the host interface and also the communication controller interface continues to work until the undervol tage detection timer expires. the uv bat undervoltage flag also overrules a uv cc undervoltage flag and the tran sceiver tle9221sx ends up in bd_sleep mode. simultaneous undervoltage events at uv bat and uv io , additionally disable the host interface and the communication controller interface in comparison to a single uv bat undervoltage event. after the undervoltage detection timer expires, the tle9221sx chan ges over to bd_sleep mode. the least significant undervoltage flag is the uv cc undervoltage flag. an active uv cc undervoltage flag changes the mode of operation from non-low power mode to bd _standby mode, when no other undervoltage flag is set. during an uv cc undervoltage event the transmitter is disabled. 9.4 operating mode changes by undervoltage recovery as stated in chapter 8.3 , any undervoltage flag causes a change in the operating mode and blocks the host interface and the communicati on controller interface. after recovering from the undervoltage condition, and after the undervoltage flag s are cleared, the flexray transceiver tle9221sx enables the host interface and a lso the communication cont roller interface and the host command applied at the inputs stbn and en changes the mode of operation (see figure 30 and table 16 ). 9.4.1 bd_sleep mode entry flag a special case is the undervoltage recovery from bd_sleep mode while the ho st command bd_standby is applied to the host interface. the en input pin will be disabled while the device is in bd_sleep mode. a mode changeover via host command from bd_sleep mode to bd_standby mo de is not permitted (compare with table 14 ). the transceiver distinguishes the host command bd_sleep from bd_standby, after the transceiver recovers from an undervoltage event. the bd_sleep mode entry fl ag indicates, how the changeover to bd _sleep mode occurred. if changeover to bd_sleep mode took place by setting an undervoltage flag, the bdsme flag (bd_sleep mode entry) is set to ?low? and the en input pin remains active. if changeov er to bd_sleep mode took place by a host command, the bdsme flag is set to logical ?high? and the en input pin gets disabled (see table 16 ). the bdsme is an internal flag and it is neither in dicated at the errn output nor latched in the sir. data sheet 57 rev. 1.3, 2015-09-21 tle9221sx operating mode description figure 30 change in the mode of operation by undervoltage recovery en stbn lh inh sleep bd_sleep en stbn h h inh bd_normal bd_gotosleep en stbn lh inh not_sleep 56 not_sleep en stbn l l inh not_sleep bd_standby 51 53 58 en stbn l h inh not_sleep bd_receiveonly 44 45 46 41 42 59 43 57 60 61 47 48 49 50 52 54 55 tle9221sx operating mode description data sheet 58 rev. 1.3, 2015-09-21 table 16 mode changes via undervoltage recovery 1) 2) 3) 4) no. primary operating mode stbn en wake- up flag bdsme flag 5) uv bat flag uv io flag uv cc flag secondary operating mode errn 6) rxd 7) rxen 7) inh remarks bd_sleep -> host command bd_normal 41 bd_sleep h h 2 => h x set ?h? hh 1 => bd_normal 2 => h 1=>fb 1=>fb 1 => not_sleep 8) , 9) 42 bd_sleep h h 2 => h xh set ?h? h 1 => bd_normal 2 => h 1=>fb 1=>fb 1 => not_sleep 8) , 9) 43 bd_sleep h h 2 => h xhh set ?h? 1 => bd_normal 2 => h 1=>fb 1=>fb 1 => not_sleep 8) , 9) , 10) bd_sleep -> host command bd_receiveonly 44 bd_sleep h l x x set ?h? hh 1 => bd_receiveonly h/l 1=>fb 1=>fb 1 => not_sleep 11) 45 bd_sleep h l x x h set ?h? h 1 => bd_receiveonly h/l 1=>fb 1=>fb 1 => not_sleep 11) 46 bd_sleep h l x x h h set ?h? 1 => bd_receiveonly h/l 1=>fb 1=>fb 1 => not_sleep 10) , 11) bd_sleep -> host command bd_sleep 47 bd_sleep l h h x set ?h? hhbd_sleep hhhsleep 12) 48 bd_sleep l h h x h set ?h? h bd_sleep 1 => h 1 => h 1 => h sleep 12) 49 bd_sleep l h h x h h set ?h? bd_sleep hhhsleep 10) , 12) bd_sleep -> host command bd_standby 50 bd_sleep l l h h set ?h? hhbd_sleep hhhsleep 12) , 13) 51 bd_sleep l l h l set ?h? hh 1 => bd_standby hhh 1 => not_sleep 12) , 14) 52 bd_sleep l l h h h set ?h? h bd_sleep 1 => h 1 => h 1 => h sleep 12) , 13) 53 bd_sleep l l h l h set ?h? h 1 => bd_standby 1 => h 1 => h 1 => h 1 => not_sleep 12) , 14) 54 bd_sleep l l h h h h set ?h? bd_sleep hhhsleep 12) , 13) 55 bd_sleep l l h l h h set ?h? 1 => bd_standby hhh 1 => not_sleep 12) , 14) bd_standby 56 bd_standby h h 2 => h xhh set ?h? 1 => bd_normal 2 => h 1=>fb 1=>fb not_sleep 8) , 9) , 15) 57 bd_standby h l x x h h set ?h? 1 => bd_receiveonly h/l 1=>fb 1=>fb not_sleep 11) , 15) , 16) 58 bd_standby l l h x h h set ?h? bd_standby hhhnot_sleep 15) tle9221sx operating mode description data sheet 59 rev. 1.3, 2015-09-21 59 bd_standby l l l x h h set ?h? bd_standby lllnot_sleep 15) , 16) 60 bd_standby l h h x h h set ?h? 1 => bd_gotosleep hhhnot_sleep 15) 61 bd_standby l h l x h h set ?h? bd_standby lllnot_sleep 15) , 16) 1) the table describes the states and signal s of flags, operating modes and output pins . this table does not contain any timing information. time for mode changes or the response time of the digital outputs are specified in the electrical characteristics (compare with table 22 ). 2) all flags are ?low? active. ?l? mean s the flag is set. ?x? = ?don?t care?. the color red stands for the event wh ich triggered the mode transition. for example: set ?l? or set ?h?. the color blue stands for the consequence of the trigger event. the numbers, ?1 =>?, ?2 =>? indicate the order of the consequences. for example: ?1=> bd_normal? means the transceive r tle9221sx changes over to bd_normal mode. ?2=> h? means the flag is cleared after the tle9221sx has changed over to bd_normal mode. ?fb? stands for ?follow bus? and me ans that depending on the signal on the flexray bus, the pins rxd and rxen can either be ?hi gh? or ?low?. 3) the wake-up flag stands for a detected wake-up event (compare with chapter 7.3 and table 10 ). the uv bat flag is the same as the uv bat undervoltage flag, which is set after the uv bat undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv io flag is the same as the uv io undervoltage flag, wh ich is set after the uv io undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv cc flag is the same as the uv cc undervoltage flag, which is set after the uv cc undervoltage detection ti mer expires (compare with chapter 8.3.1 ). 4) the errn output indicates the wake-up flag, the wa ke-up source bit and the error bit (compare with table 9 ). the error bit is set only by the undervoltage bits, such as the uv bat undervoltage bit (bit 8), the uv cc undervoltage bit (bit 9) and the uv io undervoltage bit (bit 10). all other possible sources setting the error bit, such as, for example, a bus failure or an overtemperature event, are considered as not set in this table. 5) bd_sleep mode entry flag disables the en input pin when set to logical ?low? (see chapter 9.4.1 ) 6) the signal at the errn output pin depends on the host command applied and no t on the current operating mode (compare with chapter 6.3 ). 7) the signals at the rxd and rxen outputs de pend on the current operating mode, and ar e independent of the host command applied (compare with table 5 ). 8) while tle9221sx changes over to bd_normal mode the wake-up flag is cleared. moreover , the wake-up flag cannot be set in non-l ow power mode, and therefore, the wake-up flag is always ?high? in bd_normal mode (see chapter 7.3 ). 9) changing over to bd_normal mode clears the sir, including the un dervoltage bits and therefore se ts the errn output to ?high? (compare with chapter 6.3.1 ). 10) bd_sleep mode was either entered by a host command or by setting the uv bat or uv io undervoltage flag (see table 15 ). 11) if the host command bd_receiveonly mode is applied, the errn output indicates th e wake-up source bit (see table 9 ). 12) this assumes no wake-up event was dete cted and the wake-up flag is cleared. table 16 mode changes via undervoltage recovery 1) 2) 3) 4) no. primary operating mode stbn en wake- up flag bdsme flag 5) uv bat flag uv io flag uv cc flag secondary operating mode errn 6) rxd 7) rxen 7) inh remarks tle9221sx operating mode description data sheet 60 rev. 1.3, 2015-09-21 13) the bdsme flag is cleared, chan geover to bd_sleep mode was made by a host command (see chapter 9.4.1 ). 14) the bdsme flag is set, changeover to bd_sleep mode wa s made by setting one or mo re undervoltage flags (see chapter 9.4.1 ). 15) in bd_standby mode, only the uv cc undervoltage flag could be active, since an y other active undervoltage flag would change the mode of operation to bd_sleep mod e (compare with table 15 ). 16) a wake-up flag could have been set by a wake-up event while the transceiver was in bd_standby mode. data sheet 61 rev. 1.3, 2015-09-21 tle9221sx operating mode description 9.5 operation mode changes by the wake-up flag setting the wake-up flag triggers a mode change to bd _standby mode, regardless of the transceiver being in bd_sleep mode or in the bd_gotos leep command. while the transcei ver tle9221sx remains in bd_standby mode, a wake-up event sets the wake-up bit and the wake -up flag. the wake-up flag is indicated at the errn, rxd and rxen outputs. no mode change by th e wake-up event is appl ied (for details see figure 31 and table 17 ). the wake-up flag can be set only in bd_sleep mode , bd standby mode or while the bd_gotosleep command is being executed (for details see ?wake-up flag and wake-up bits? on page 32 ). while the wake-up flag is active, th e flexray transceiver tle9221sx cannot change over to bd_sleep mode again (see figure 28 ). to reset the wake-up flag , either change the operat ing mode of the tle9221sx to bd_normal mode or read out the sir. figure 31 operating mode change by wake-up flag setting the wake-up flag triggers no t only a change in the operating mo de, but also clears all undervoltage flags. the undervoltage bits avai lable in the sir remain active. in case the undervoltage event rema ins present, setting the wake-up flag clears the undervoltage flag. the undervoltage detection timer is re started and the undervoltage flag is set again when the undervoltage detection timer expires. note: setting the wake-up flag clears only the undervol tage flag, not the undervoltage bit. the undervoltage bit remains active and is visible in the sir. en stbn lh inh sleep bd_sleep bd_gotosleep en stbn lh inh not_sleep en stbn l l inh not_sleep bd_standby 62 63 64 65 tle9221sx operating mode description data sheet 62 rev. 1.3, 2015-09-21 table 17 mode changes by setting the wake-up flag 1) 2) 3) 4) 1) the table describes the states and signal s of flags, operating modes and output pins . this table does not contain any timing information. time for mode changes or the response time of the digital outputs are specified in the electrical characteristics (compare with table 22 ). 2) all flags are ?low? active. ?l? mean s the flag is set. ?x? = ?don?t care?. the color red stands for the event wh ich triggered the mode transition. for example: set ?l? or set ?h?. the color blue stands for the consequence of the trigger event. the numbers, ?1 =>?, ?2 =>? indicate the order of the consequences. for example: ?1=> bd_normal? means the transceive r tle9221sx changes over to bd_normal mode. ?2=> h? means the flag is cleared after the tle9221sx has changed over to bd_normal mode. ?fb? stands for ?follow bus? and me ans that depending on the signal on the flexray bus, the pins rxd and rxen can either be ?hi gh? or ?low?. 3) the wake-up flag stands for a detected wake-up event (compare with chapter 7.3 and table 10 ). the uv bat flag is the same as the uv bat undervoltage flag, which is set after the uv bat undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv io flag is the same as the uv io undervoltage flag, wh ich is set after the uv io undervoltage detection ti mer expires (compare with chapter 8.3.1 ). the uv cc flag is the same as the uv cc undervoltage flag, which is set after the uv cc undervoltage detection ti mer expires (compare with chapter 8.3.1 ). 4) the errn output indicates the wake-up flag, the wa ke-up source bit and the error bit (compare with table 9 ). the error bit is set only by the undervoltage bits, such as the uv bat undervoltage bit (bit 8), the uv cc undervoltage bit (bit 9) and the uv io undervoltage bit (bit 10). all other po ssible sources setting the error bit, su ch as, for example, a bus failure or an overtemperature event, are cons idered as not set in this table. no. primary operating mode stbn en wake-up flag uv bat flag uv io flag uv cc flag secondary operating mode errn 5) 5) the signal at the errn output pin depends on the host command applied and no t on the current operating mode (compare with chapter 6.3 ). rxd 6) 6) the signals at the rxd and rxen outputs de pend on the current operatio n mode, and are independent of the host command applied (compare with table 5 ). rxen 6) inh remarks bd_sleep 62 bd_sleep l l set ?l? 2 => h 2 => h 2 => h 1 => bd_standby 1 => l 1 => l 1 => l 1 => not_sleep 7) 7) setting the wake-up flag also resets all undervoltage flags. 63 bd_sleep l h set ?l? 2 => h 2 => h 2 => h 1 => bd_standby 1 => l 1 => l 1 => l 1 => not_sleep 7) bd_standby 64 bd_standby l l set ?l? hh 2 => h bd_standby 1 => l 1 => l 1 => l not_sleep 7) , 8) 8) in bd_standby mode, only the uv cc undervoltage flag can be active (see table 15 ). bd_gotosleep 65 bd_gotosleep l h set ?l? 2 => h 2 => h 2 => h 1 => bd_standby 1 => l 1 => l 1 => l 1 => not_sleep 7) , 8) data sheet 63 rev. 1.3, 2015-09-21 tle9221sx bus error indication 10 bus error indication in case the tle9221sx is not able to dr ive the correct data to th e flexray bus, the transc eiver sets the bus error bit (bit 4). the bus error bit indicates faulty data by setting the errn output to ?low? (compare with table 9 ). therefore, three different detect ion mechanisms are implemented: ?uv cc undervoltage detection ? rxd and txd bit comparison ? overcurrent detection just as any other sir entry, the bus error bit is reset eith er by a sir read-out or by changing over to bd_normal mode (compare with chapter 6.3.1 ?reset the errn output pin? ). setting the bus error bit disables the transmitter of the tle9221sx in order to av oid corrupt data on the flexray bus. an active bus error bit does not trigger any change in the mode of operation. 10.1 setting the bus error bit by uv cc undervoltage the transmitter of the tle9221sx is fed by the power supply uv cc (compare with figure 2 ). in case uv cc is in undervoltage condition, the tle9221sx cannot drive th e correct bus levels to the flexray bus. therefore, the transceiver sets the uv cc undervoltage bit together with th e bus error bit and the error bit. in bd_normal mode, the active uv cc undervoltage bit and the active bus error bit disable the transmitter. the uv cc undervoltage bit starts the uv cc undervoltage timer and if the timer ex pires, the undervoltage flag is set and a mode changeover is initiated (see also chapter 8.3.3 ?undervoltage event at uvcc? ). 10.2 setting the bus error bi t by rxd and txd comparison the transceiver tle9221sx compar es the digital input signal at txd with the signal received from the flexray bus at the rxd output. if the data tran smit signal at the txd input is differ ent from the signal received at the rxd output, the tle9221sx sets the bus error bit. the rxd to txd bit comparison is ac tive only, when the transceiver tle 9221sx is in bd_normal mode and the transmitter is active (txen = ?low?; bg e = ?high?). both, the rising and the falling edge at the txd input signal trigger an internal comparator to compare the txd sign al with the rxd signal. the results are stored in an internal error counter. when the internal error counte r exceeds 10 reported comparison failures, the bus error bit is set. the error counter is reset wh en the transmitter is reset. 10.3 setting the bus error bi t by overcurrent detection four different current sensors monitor the output current and the input curre nt at the pins bp and bm. in case the tle9221sx detects an overcurrent caused by a bus sh ort-circuit either to gnd or to one of the power supplies, the tle9221sx sets the bus error bit. data sheet 64 rev. 1.3, 2015-09-21 tle9221sx overtemperature protection 11 overtemperature protection the transmitter of tle9221sx is protec ted against overheating with an in ternal temperature sensor (compare with figure 1 ). the temperature sensor provid es two temperature thresholds: t j(warning) and t j(shut_down) . on exceeding the lower threshold t j(warning), the transceiver sets the over temperature warning bit (bit 6), indicating a ?high? temperature situation. on exceeding the upper threshold t j(shut_down), the transceiver tle9221sx sets the overtemperature shut down bit (bit 5), indicating a critical temperature situation. on reaching the t j(shut_down) threshold, the transceiver tle9221sx al so disables the transmitter (see figure 32 ). the overtemperature detection of th e transmitter is active only in bd_normal mode. an overtemperature detection event does not trigger an y change in the operating mode. both bits, the overtemperature shut down bit and the overtemperature warning bit set the error bit (bit 11) in the sir. the error bit is indicated at the errn output (compare with chapter 6.3 ?status information at the errn output pin? ). the transmitter can be enabled again after an over temperature event by clearing the sir (see also chapter 6.2.3 ?clearing sequence of sir? ). figure 32 overtemperature protection t bp bm t t j t j(warning) t j(shut_down) txd t rxd t errn t bd_normal dretime errn data sheet 65 rev. 1.3, 2015-09-21 tle9221sx transmitter time-out 12 transmitter time-out to ensure that an active transmitte r blocks the flexray bus permanently, a time-out function is implemented within the tle9221sx. in case the transmitter is active for the time period t > dbdtxactivemax, the transmitter will be disa bled automatically (see figure 33 ). the transmitter time-out sets the transmitter time-out bit (bit 7) in the sir and also the error bit. in bd_normal mode, the transmitter time-out is indicated at the errn output by a logical ?low? signal. to reset the txen or bge time-out, ei ther change over again to bd_normal mode or re ad out the sir (see chapter 6.3.1 ?reset the errn output pin? ). figure 33 transmitter time-out function t bp bm txd t rxd t errn t bd_normal dreactiontime errn t t txen bge dbdtxactivemax transmitter time-out transmitter active transmitter idle transmitter idle data sheet 66 rev. 1.3, 2015-09-21 tle9221sx mode indication, power-up and parity information 13 mode indication, power-up and parity information 13.1 power-up bit after switching on the power supplies uv cc and uv bat , the flexray transceiver tle9221sx sets the power-up bit (bit 3) in the sir. the power-up bit is visible only by reading out the sir and will be reset by clearing the sir (see chapter 6.2.3 ?clearing sequence of sir? ). 13.2 mode indication bit en and mode indication bit stbn two bits in the sir are reserved fo r the indication of the operating mo de. the sir indicates the current mode of operation, regardless of whethe r the mode is selected via host co mmand, undervoltage flag or wake-up flag. the mode indication bits have the same order as the host commands. bit 13 of the sir reflects the related host command at the en pin of the actual mode of operation and bit 14 indicates the related host command at the stbn pin (compare with table 18 ). 13.3 even parity bit the even parity bit (bit 15) can be used to check the transm ission of the sir. the even parity bit is set to logical ?low? if the sum of all status bits is even, and it is logical ?high? if the sum of all status bits is odd. table 18 mode in dication bits mode of operation mode indi cation bit en (bit 13) mode indication bit stbn (bit 14) bd_normal ?high? ?high? bd_receiveonly ?low? ?high? bd_standby ?low? ?low? bd_sleep no read-out possible no read-out possible bd_gotosleep no read-out possible no read-out possible data sheet 67 rev. 1.3, 2015-09-21 tle9221sx general product characteristics 14 general product characteristics 14.1 absolute maximum ratings table 19 absolute maximum ratings vo ltages, currents and temperatures 1) all voltages with respect to ground; po sitive current flow ing into the pin; (unless otherwise specified) parameter symbol values unit note or test condition number min. typ. max. voltages supply voltage battery uvbat -0.3 ? 40 v ? p_14.1.1 supply voltage v cc uvcc -0.3 ? 6.0 v ? p_14.1.2 supply voltage v io uvio -0.3 ? 6.0 v ? p_14.1.3 dc voltage versus gnd on the pin bp ubp -40 ? 40 v ? p_14.1.4 dc voltage versus gnd on the pin bm ubm -40 ? 40 v ? p_14.1.5 dc voltage versus gnd on the pin inh uinh -0.3 ? uv bat + 0.3 v ? p_14.1.6 dc voltage versus gnd on the pin wake uwake -27 ? uv bat + 0.3 v ? p_14.1.7 dc voltage versus gnd on the pin stbn uvstbn -0.3 ? v io v? p_14.1.8 dc voltage versus gnd on the pin en uven -0.3 ? v io v? p_14.1.9 dc voltage versus gnd on the pin txd uvtxd -0.3 ? v io v? p_14.1.10 dc voltage versus gnd on the pin txen uvtxen -0.3 ? v io v? p_14.1.11 dc voltage versus gnd on the pin bge uvbge -0.3 ? v io v? p_14.1.12 dc voltage versus gnd on the pin rxd uvrxd -0.3 ? v io v? p_14.1.13 dc voltage versus gnd on the pin rxen uvrxen -0.3 ? v io v? p_14.1.14 dc voltage versus gnd on the pin errn uverrn -0.3 ? v io v? p_14.1.15 currents output current on the pin inh iinh -1 ? ? ma ? p_14.1.16 data sheet 68 rev. 1.3, 2015-09-21 tle9221sx general product characteristics note: stresses beyond those listed he re may cause permanent damage to the device. exposure to absolute maximum rating conditions for exte nded periods may affect device re liability. integrated protection functions are designed to prevent ic destruction unde r fault conditions describe d in the data sheet. fault conditions are considered as ?outside? the normal -operating range. protection functions are not designed for continuous repetitive operation. output current on the pin rxd irxd -40 ? 40 ma ? p_14.1.17 output current on the pin rxen irxen -40 ? 40 ma ? p_14.1.18 output current on the pin errn ierrn -40 ? 40 ma ? p_14.1.19 temperatures junction temperature tjunction -40 ? 150 c? p_14.1.20 storage temperature ts - 55 ? 150 c? p_14.1.21 esd immunity esd immunity at bp, bm, v bat , wake versus gnd uesdext -10 ? 10 kv hbm, (100 pf via 1.5 k ), 2) ; p_14.1.22 esd immunity at all other pins uesdint -2 ? 2 kv hbm, (100 pf via 1.5 k ), 2) ; p_14.1.23 esd immunity to gnd (all pins) uesdcdm -750 ? 750 v cdm, 3) ; p_14.1.24 1) not subject to production test, specified by design. 2) esd susceptibility, human body model ?h bm? according to ansi/esda/jedec js-001. 3) esd susceptibility, charged device model ?cdm? according to eia/jesd22-c101 or esda stm5.3.1 table 19 absolute maximum ratings vo ltages, currents and temperatures 1) (cont?d) all voltages with respect to ground; po sitive current flow ing into the pin; (unless otherwise specified) parameter symbol values unit note or test condition number min. typ. max. data sheet 69 rev. 1.3, 2015-09-21 tle9221sx general product characteristics 14.2 functional range note: within the functional range, th e ic operates as described in the circuit description. the electrical characteristics are specifie d within the conditions given in the related electrical characteristics table. table 20 functional range parameter symbol values unit note or test condition number min. typ. max. supply voltages transceiver supply voltage v bat uv bat 5.5 ? 18 v 1) ; 1) the tle9221sx is fully functional, includin g the wake-up functions, in the specified uv bat range while uv cc and uv io are also in their operating range. p_14.2.1 transceiver supply voltage v bat extended supply range uv bat- ext 18 ? 40 v 60 s, 2) , 3) ; 2) not subject to production test, specified by design 3) the extended supply range covers the load requiremen ts according to iso 16750-2 (load dump, jump start). this range is not qualified for cont inuous, repetitive operation. p_14.2.2 transceiver supply voltage v cc uv cc 4.75 ? 5.25 v ? p_14.2.3 transceiver supply voltage v io uv io 3.0 ? 5.25 v ? p_14.2.4 functional range v bat including local and remote wake-up functions uv bat_w ake 5.5 ? 18 v 1) ; p_14.2.5 thermal parameters junction temperature t junction -40 ? 150 c ? p_14.2.6 data sheet 70 rev. 1.3, 2015-09-21 tle9221sx general product characteristics 14.3 thermal resistance note: this thermal data was generated in accordance with jedec jesd51 standards. for more information, please visit www.jedec.org . table 21 thermal resistance 1) 1) not subject to production test, specified by design parameter symbol values unit note or test condition number min. typ. max. thermal resistance junction to ambient 1) r thja ? 100 ? k/w 2) 2) specified r thja value is according to jedec jesd51-2,-7 at natu ral convection on fr4 2s2p board; the product (tle9221sx) was simulated on a 76.2 x 114.3 x 1.5 mm boar d with 2 inner copper layers (2 x 70m cu, 2 x 35m cu) p_14.3.1 thermal shutdown junction temperature thermal warning temperature t j(warning) 150 160 170 c ? p_14.3.2 thermal shut-down temperature t j(shut_down) 170 180 190 c ? p_14.3.3 temperature difference between warning temperature and shut-down temperature t=t j(shut_down) -t j(warning) t 10 20 25 c ? p_14.3.4 data sheet 71 rev. 1.3, 2015-09-21 tle9221sx electrical characteristics 15 electrical characteristics 15.1 functional device characteristics table 22 electrical characteristics 5.5 v < uv bat <18v; 3.0v data sheet 88 rev. 1.3, 2015-09-21 tle9221sx electrical characteristics figure 35 transmitter characteristics figure 36 transmitter characteristics fr om ?idle? to ?active? and vice versa 100% v io 50% v io 0% v io txd ubdtx active 300 mv 0 mv -300 mv - ubdtx active ubus dbdtx10 dbdtx01 100...4400ns dbustx10 dbustx01 100% 80 % 20 % 0 % t t 100% uv io 50% uv io 0% uv io txen 0 v - 30 mv - 300 mv - ubdtx active ubus dbdtxia dbdtxai dbustxia dbustxai t t bge = high txd = low data sheet 89 rev. 1.3, 2015-09-21 tle9221sx electrical characteristics figure 37 transmitter characteristics with bus guardian enable 100% uv io 50% uv io 0% uv io bge 0 v - 30 mv - 300 mv - ubdtx active ubus dbdbgeia dbdbgeai dbustxia dbustxai t t txen = low txd = low data sheet 90 rev. 1.3, 2015-09-21 tle9221sx electrical characteristics figure 38 receiver ti ming characteristics ubusrx data 300 mv 150 mv 0 v - 150 mv - 300 mv - ubusrx data dbusrx10 dbusrx01 dbusrx0 bd dbusrx1 bd 100% v io 50% v io 0% v io dbdrx10 dbdrx01 the receiver timings are valid for bus signals dbusrx0 bd and dbusrx1 bd longer as the minimum bit time = 60 ns and for both polarities: dbusrx0 bd = dbusrx1 bd > t bit = 60 ns ubus t t data sheet 91 rev. 1.3, 2015-09-21 tle9221sx electrical characteristics figure 39 receiver transition from ?idle? to ?active? and vice versa 0 v - 30 mv - 150 mv - 300 mv - ubusrx dbusactive dbusidle 100% v io 50% v io 0% v io dbdrxia dbdrxai 100% v io 50% v io 0% v io rxd rxen the signals on the pins rxd and rxen switch within a delay < 10 ns t dbusrx10 dbusrx01 ubus t t data sheet 92 rev. 1.3, 2015-09-21 tle9221sx application information 16 application information 16.1 esd robustness according to iec61000-4-2 tests for esd robustness according to iec61000-4-2 ?gun test? (150 pf, 330 ) have been performed. the results and test conditions are available in a separate test report. 16.2 bus interface simulation model parameter the simulated value r bdtransmitter describes the equivalent bus driver output impedance. figure 40 bus driver output resistance 16.3 typical rxd output signals the simulated rxd output behavior describe the rise an d fall times of the rxd pin on a 50 ohm, 10 pf load at the end of a standard lossless transmissi on line with 1 ns propagation delay (see table 25 , figure 41 and figure 42 ). table 23 esd robustness according to iec61000-4-2 performed test symbol result unit remarks electrostatic discharge voltage at pin bm, bp and wake versus gnd uesd iec + 11 kv 1) , 2) positive pulse 1) esd susceptibility ?esd gun iec61000-4-2?. tested by external test facility (ibee zwickau, emc test report no.: 22-02-13). 2) test result without any external bus fi lter network, e.g. common mode choke. electrostatic discharge voltage at pin bm, bp and wake versus gnd uesd iec -11 kv 1) , 2) negative pulse table 24 bus driver simulation resistor parameter symbol values unit note or test condition number min. typ. max. bus driver interface simulation resistor rd bdtransmitter 30 100 500 1) ; 1) simulated value for reference purposes only. r bdtransmitter = 50 x ( ubus 100 C ubus 40 ) / ( 2.5 x ubus 40 C ubus 100 ) ubus 100 = differential output voltage on a 100||100pf load, while driving data_1 to the bus. value based on simulation. ubus 40 = differential output voltage on a 40||100pf load, while driving data_1 to the bus. value based on simulation. data sheet 93 rev. 1.3, 2015-09-21 tle9221sx application information figure 41 rxd output rise time (typical simulation value) table 25 rxd output signal (simulated values) parameter symbol values unit note or test condition number min. typ. max. sum of rise and fall time on the rxd output dbdrxd r10 + dbdrxd f10 ? ? 16.5 ns c_bdrxd = 10 pf, 1) r_cbdrxd = 50 ; 1) simulated value for reference purposes only. difference of rise and fall time on the rxd output |dbdrxd r10 - dbdrxd f10 | ??5 nsc_bdrxd=10pf, 1) r_cbdrxd = 50 ; -1.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 v rxd in v t in ns rxd output - rise time (typical) rxd output - rise time (typical) data sheet 94 rev. 1.3, 2015-09-21 tle9221sx application information figure 42 rxd output fall time (typical simulation value) 16.4 operating temperature the flexray transceiver tle9221sx is qualified for temperature grade 1 (-40c to +125c ambient operating temperature) according to aec - q100. grade 1 according aec - q100 is equivalent to the ambient temperature for class 1 t amb_class1 . infineon specifies for the electrical characteristics (see table 22 ) the junction temperature t junction . the ambient temperature can be calculated with th e power dissipation and the thermal resistance r thja (see figure 43 ). figure 43 ambient temperature t a calculation -1.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 5 10 15 20 25 30 v rxd in v t in ns rxd output - fall time (typical) t j = t a + r thja x p d t a = t j - r thja x p d with: t a = ambient temperature t j = junction temperature p d = power dissipation of the flexray transceiver r thja = thermal resistance junction to ambient data sheet 95 rev. 1.3, 2015-09-21 tle9221sx application information 16.5 application example figure 44 simplified applicat ion example for the tle9221sx 16.6 further application information ? please contact us for information regarding the pin fmea. ? for further information you may visit: http://www.infineon.com r ta e.g tle4473gv53 inh1 inh2 1 q1 q2 10f 10 f 16 3 7 9 10 5 8 6 2 4 micro controller e.g. tc17xx-series gnd 100nf 100nf 11 100nf 15 12 100k lcmc r tb 13 flexray communication controller inh v bat v cc v io bp bm wake bge rxen txen txd rxd errn stbn en bp bm gnd 14 ldo 100nf gnd 10 f wake v bat data sheet 96 rev. 1.3, 2015-09-21 tle9221sx package outlines 17 package outlines figure 45 pg-ssop-16 green product (rohs compliant) to meet the world-wide customer requirements for en vironmentally friendly products and to be compliant with government regulations, the device is available as a green product. green products are rohs compliant (i.e pb-free finish on leads and suitable for pb -free soldering according to ipc/jedec j-std-020). for further info rmation on alternative pa ckages, please visit our website: http://www.infineon.com/packages . dimensions in mm data sheet 97 rev. 1.3, 2015-09-21 tle9221sx revision history 18 revision history revision date changes 1.3 2015-08-18 data sheet updated based on data sheet rev. 1.2: package name changed to pg-ssop-16: ? all pages paragraph on flexray consortium removed: ? page 6 , description ?iso 17458? added: ? page 5 , features ? page 6 , description reference to flexray epl removed: ? page 5 , features ? page 6 , description ? page 11 , functional description ? page 19 , host interface ? page 20 , power supply interface ? page 26 , reset the errn output pin ? page 27 , wake-up detector ? page 35 , inh output ? page 45 , operating mode description ? page 56 , bd_sleep mode entry flag ?ct index ...? removed: ? table 19 , absolute maximum rating s voltages, currents and temperatures ? table 20 , functional range ? table 22 , electrical characteristics ? table 23 , esd robustness according to iec61000-4-2 ? table 24 , bus driver simulation resistor ? table 25 , rxd output signal (simulated values) ? page 94 , operating temperature 1.2 2015-03-11 data sheet updated based on data sheet rev. 1.1: ? all pages: changed package name to pg-ssop16-1 ? page 12 , table 2 footnote updated ? page 69 , table 20 max. limit of the extend ed functional range for uv bat_ext (p_14.2.2) updated. data sheet 98 rev. 1.3, 2015-09-21 tle9221sx revision history 1.1 2013-07-15 data sheet updated based on data sheet rev. 1.0: ? page 69 , table 20 : new parameter for the supply uv bat added: extended functional range for uv bat_ext (p_14.2.2). 1.0 2013-05-17 data sheet created. revision date changes trademarks of infineon technologies ag aurix?, c166?, canpak?, cipos?, cipurse?, coolmos?, coolset?, core control?, crossave?, dave?, di-pol?, easypim?, econobridge?, econodual?, econopim?, econopack?, eicedriver ?, eupec?, fcos?, hitfet?, hybridpack?, i 2 rf?, isoface?, isopack?, litix?, mipaq?, modstack?, my-d?, novalithic?, optimos?, origa?, powercode?, pr imarion?, primepack?, primestack ?, pro-sil?, profet?, rasic?, reversave?, satric?, sieget?, sindrion?, sipmos?, smartlewis?, spoc?, solid flash?, tempfet?, th inq!?, trenchstop?, tricore?. other trademarks advance design system? (ads) of agilent tech nologies, amba?, arm?, multi-ice?, keil?, primecell?, realview?, thumb?, vision? o f arm limited, uk. autosar? is licensed by autosar developm ent partnership. bluetooth? of bluetooth sig inc. cat-iq? of dect forum. colossus?, firstgps? of trimble navigation ltd. emv? of emvco, llc (visa holdings inc.). epcos? of epcos ag. flexgo? of microsoft corporation. flexray? is licensed by flexray consortium. hyperterminal? of hilgraeve incorporated. iec? of co mmission electrotechnique internationale. irda? of infrared dat a association corporation. iso? of international organiza tion for standardization. matlab? of mathwo rks, inc. maxim? of maxim integrated prod ucts, inc. microtec?, nucleus? of mentor graphics corporation. mipi? of mipi alliance, inc. mips? of mips technologies, inc., usa. murata? of murata manufacturing co., microwav e office? (mwo) of applied wave research inc., om nivision? of omnivision te chnologies, inc. openwave ? openwave systems inc. red hat? red hat, inc. rfmd? rf micro devices, inc. sirius? of sirius satellite radio inc. solaris? of sun microsy stems, inc. spansion? of spansion llc ltd. symbian? of symbian softwa re limited. taiyo yuden? of taiyo yuden co . teaklite? of ceva, inc. tektronix? of t ektronix inc. toko? of toko kabushiki kaisha ta. unix? of x/open company limited. verilog?, palladi um? of cadence design systems, inc. vlynq? of texas instruments incorporated. vxworks?, wind river? of wind river systems, inc. zetex? of diodes zetex limited. last trademarks update 2011-11-11 edition 2015-09-21 published by infineon technologies ag 81726 munich, germany ? 2014 infineon technologies ag. all rights reserved. do you have a question about any aspect of this document? email: erratum@infineon.com document reference doc_number legal disclaimer the information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. with respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, infineon technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non- infringement of intellectual property rights of any third party. information for further information on technology, delivery terms and conditions and prices, please contact the nearest infineon technologies office ( www.infineon.com ). warnings due to technical requirements, components may contain dangerous substances. for information on the types in question, please contact the nearest infineon technologies office. infineon technologies components may be used in life-support devices or systems only with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered. www.infineon.com |
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