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| cypress semiconductor corporation 198 champion court san jose , ca 95134 - 1709 408 - 943 - 2600 document number: 002 - 14867 rev. *d revised october 17, 2016 the following document contains information on cypress products. although the document is marked with the name broadcom, the company that originally developed the specification, cypress will continue to offer these pr oducts to new and existing customers. continuity of specifications there is no change to this document as a result of offering the device as a cypress product. any changes that have been made are the result of normal document improvements and are noted in the document history page, where supported. future revisions will occur when appropriate, and changes will be noted in a document history page. continuity of ordering part numbers cypress continues to support existing part numbers. to order these products , please use only the cypress ordering part number listed in the table. broadcom ordering part number cypress ordering part number bcm20705b0kwfbgt bcm20705b0kwfbg bcm20705a1kwfbg BCM20705A1KWFBGT cyw20705b0kwfbgt cyw20705b0kwfbg cyw20705a1kwfbg cyw20705a1kwfbgt for more information please visit our website at www.cypress.com or contact your local sales office for additional information about cypress products and services. our customers cypress is for true innovators C in companies both large and small. our customers are smart, aggressive, out - of - the - box thinkers who design and develop game - changing products th at revolutionize their industries or create new industries with products and solutions that nobody ever thought of before. about cypress founded in 1982, cypress is the leader in advanced embedded system solutions for the worlds most innovative automotive , industrial, home automation and appliances, consumer electronics and medical products. cypresss programmable systems - on - chip, general - purpose microcontrollers, analog ics, wireless and usb - based connectivity solutions and reliable, high - performance memo ries help engineers design differentiated products and get them to market first. cypress is committed to providing customers with the best support and engineering resources on the planet enabling innovators and out - of - the - box thinkers to disrupt markets an d create new product categories in record time. to learn more, go to www.cypress.com .
mcs20705-ds104-r 5300 california avenue ? irvine, ca 92617 ? phone: 949-926-5000 ? fax: 949-926-5203 november 13, 2014 data sheet bcm20705 single-chip bluetooth transceiver and baseband processor figure 1: system block diagram general description features the broadcom? bcm20705 is a monolithic, single- chip, bluetooth 4.1 compliant, stand-alone baseband processor with an integrated 2.4 ghz transceiver. manufactured using the industry's most advanced 65 nm cmos low-power process, the bcm20705 employs the highest level of integration, eliminating all critical external components, and thereby minimizing the device?s footprint and costs associated with the implementation of bluetooth solutions. the bcm20705 is the optimal solution for voice and data applications that require a bluetooth sig standard host controller interface (hci) via usb, uart h4 or h5, and pcm audio interface support. the bcm20705 radio transceiver?s enhanced radio performance meets the most stringent industrial temperature application requirements for compact integration into mobile handset and portable devices. the bcm20705 is fully compatible with all standard tcxo frequencies and provides full radio compatibility, enabling it to operate simultaneously with gps and cellular radios. ? bluetooth 4.1 + edr compliant ? class 1 capable with built-in pa ? programmable output power control meets class 1, class 2, or class 3 requirements ? use supply voltages up to 5.5v ? supports broadcom smartaudio?, wide-band speech, sbc codec, and packet loss concealment. ? fractional-n synthesizer supports frequency references from 12 mhz to 52 mhz ? automatic frequency detection for standard crystal and tcxo values when an external 32.768 khz reference clock is provided. ? ultra-low power consumption ? supports serial flash interfaces ? available in a 50-ball fpbga package. ? arm7tdmi-s??based microprocessor with integrated rom and ram ? supports mobile and pc applications without external memory ? a usb hub applications ? desktop and laptop personal computers ? computer peripheral devices (pcmcia cards, cf cards, and usb dongles) ? personal digital assistants ? automotive telematic systems bcm20705 microprocessor and memory unit (upu) bluetooth baseband core (bbc) high-speed peripheral transport unit (ptu) radio transceiver tcxo lpo pcm/i 2 c usb uart/spi gpio spi master bsc broadcom ? , the pulse logo, connecting everything ? , and the connecting everything logo are among the trademarks of broadcom corporation and/or its affiliates in the united states, certain other countries and/or the eu. any other trademarks or trade names mentioned are the property of their respective owners. this data sheet (including, without limitation, the broadcom component(s) identified herein) is not designed, intended, or certified for use in any military, nuclear, medical, mass transportation, aviation, navigations, pollution control, hazardous substances management, or other high-risk application. broadcom provides this data sheet ?as-is,? without warranty of any kind. broadcom disclaims all warranties, expressed and implied, including, without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non- infringement. broadcom corporation 5300 california avenue irvine, ca 92617 ? 2014 by broadcom corporation all rights reserved printed in the u.s.a. revision history revision date change mcs20705-ds104-r 11/13/14 updated: ? bluetooth compatibility from 4.0 to 4.1 mcs20705-ds103-r 03/04/14 updated: ? drive strength in table 24 on page 68 mcs20705-ds102-r 2/25/13 updated: ? ?host controller power management? on page 22 ? ?hci 3-wire transport (uart h5)? on page 36 mcs20705-ds101-r 08/09/12 updated: ? table 1: ?power control pin summary,? on page 32 ? ?major features? on page 18 ? section 3: ?bluetooth baseband core,? on page 28 ? ?bluetooth 3.04.0 + edr features? on page 29table 1: ?power control pin summary,? on page 32 ? ?bbc power management? on page 33 ? ?serial enhanced coexistence interface? on page 34 ? section 4: microprocessor unit, ?overview? on page 36 ? table 2: ?otp programming supply voltage requirements,? on page 39 ? ?tcxo clock request support? on page 51 ? table 10: ?bcm20702bcm20705 signal descriptions,? on page 57 ? table 21: ?pad i/o characteristics,? on page 65 ? ?startup timing? on page 73 ? section 11: ?ordering information,? on page 92 mcs20705-ds100-r 10/11/11 initial release. table of contents bcm20705 data sheet broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 3 broadcom confidential table of contents about this document ............................................................................................................................... ... 8 purpose and audience ........................................................................................................... ................. 8 acronyms and abbreviations..................................................................................................... .............. 8 document conventions ........................................................................................................... ................ 8 technical support ............................................................................................................................... ......... 8 section 1: overview ............................................................................................................ 9 major features ............................................................................................................................... ............... 9 block diagram ............................................................................................................................... ............. 11 usage model ............................................................................................................................... ................ 12 pc product usage model......................................................................................................... ............. 12 section 2: integrated radio transceiver......................................................................... 13 transmitter path ............................................................................................................................... .......... 13 digital modulator .............................................................................................................. ..................... 13 power amplifier ................................................................................................................ ..................... 13 receiver path ............................................................................................................................... ............... 14 digital demodulator and bit synchronizer....................................................................................... ...... 14 receiver signal strength indicator............................................................................................. ........... 14 local oscillator generation ....................................................................................................................... 14 calibration ............................................................................................................................... .................... 14 internal ldo ............................................................................................................................... ................. 15 section 3: bluetooth baseband core .............................................................................. 16 transmit and receive functions .............................................................................................................. 16 bluetooth 4.1 + edr features ................................................................................................................... 17 frequency hopping generator .................................................................................................................. 17 link control layer ............................................................................................................................... ....... 17 test mode support ............................................................................................................................... ...... 18 power management unit ............................................................................................................................ 19 rf power management ............................................................................................................ ............ 19 host controller power management ............................................................................................... ...... 19 bbc power management........................................................................................................... ........... 21 backdrive protection ........................................................................................................... ........... 21 adaptive frequency hopping .................................................................................................................... 22 collaborative coexistence ......................................................................................................................... 22 serial enhanced coexistence interface ................................................................................................... 22 seci advantages ................................................................................................................ .................. 23 seci i/o ....................................................................................................................... ......................... 23 table of contents bcm20705 data sheet broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 4 broadcom confidential section 4: microprocessor unit ....................................................................................... 24 overview ............................................................................................................................... ....................... 24 nvram configuration data and storage ................................................................................................. 25 serial interface ............................................................................................................... ....................... 25 eeprom ............................................................................................................................... ....................... 25 external reset ............................................................................................................................... .............. 25 one-time programmable memory ............................................................................................................ 26 contents ....................................................................................................................... ......................... 27 programming.................................................................................................................... ..................... 27 section 5: peripheral transport unit ............................................................................... 28 pcm interface ............................................................................................................................... ............... 28 system diagram................................................................................................................. ................... 28 slot mapping ................................................................................................................... ...................... 29 wideband speech ................................................................................................................ ................. 29 frame synchronization .......................................................................................................... ............... 30 data formatting................................................................................................................ ..................... 30 hci transport detection configuration .................................................................................................... 30 usb interface ............................................................................................................................... ............... 31 features ....................................................................................................................... ......................... 31 operation...................................................................................................................... ......................... 31 usb hub and uhe support ........................................................................................................ .......... 32 uart interface ............................................................................................................................... ............. 33 hci 3-wire transport (uart h5) ................................................................................................. ........ 33 spi ............................................................................................................................... ................................. 34 simultaneous uart transport and bridging .......................................................................................... 34 section 6: frequency references.................................................................................... 35 crystal interface and clock generation ................................................................................................... 35 crystal oscillator ............................................................................................................................... ......... 37 external frequency reference .................................................................................................................. 37 tcxo clock request support ..................................................................................................... ......... 38 frequency selection ............................................................................................................................... ... 38 frequency trimming ............................................................................................................................... ... 39 lpo clock interface ............................................................................................................................... .... 39 section 7: pin-out and signal descriptions .................................................................... 40 pin descriptions ............................................................................................................................... .......... 40 table of contents bcm20705 data sheet broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 5 broadcom confidential section 8: ball grid arrays ............................................................................................... 43 section 9: electrical characteristics ............................................................................... 44 rf specifications ............................................................................................................................... ........ 50 timing and ac characteristics ................................................................................................................. 54 startup timing ................................................................................................................. ...................... 54 usb full-speed timing.......................................................................................................... ............... 56 uart timing.................................................................................................................... ..................... 57 pcm interface timing........................................................................................................... ................. 58 bsc interface timing ........................................................................................................... ................. 62 section 10: mechanical information ................................................................................ 63 tape, reel, and packing specification ..................................................................................................... 64 section 11: ordering information .................................................................................... 65 list of figures bcm20705 data sheet broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 6 broadcom confidential list of figures figure 1: system block diagram .................................................................................................. ..................... 1 figure 2: functional block diagram.............................................................................................. ................... 11 figure 3: pc product usage model ................................................................................................ ................. 12 figure 4: ldo functional block diagram .......................................................................................... .............. 15 figure 5: pcm interface with linear pcm codec ................................................................................... ......... 28 figure 6: usb compounded device configuration ................................................................................... ...... 31 figure 7: recommended oscillator configuration .................................................................................. ......... 37 figure 8: recommended tcxo connection ........................................................................................... ........ 37 figure 9: 4.5 x 4 x 0.8 mm (wfbga) array ........................................................................................ ............. 43 figure 10: startup timing from power-on reset ................................................................................... .......... 55 figure 11: usb full-speed timing ................................................................................................ .................. 56 figure 12: uart timing .......................................................................................................... ........................ 57 figure 13: pcm interface timing (short frame synchronization, master mode) ............................................ 58 figure 14: pcm interface timing (short frame synchronization, slave mode) .............................................. 59 figure 15: pcm interface timing (long frame sy nchronization, master mode)............................................. 60 figure 16: pcm interface timing (long frame synchronization, slave mode)............................................... 61 figure 17: bsc interface timing diagram ......................................................................................... .............. 62 figure 18: 50-ball wfbga mechanical drawing ..................................................................................... ........ 63 figure 19: reel, labeling, and packing specification............................................................................ .......... 64 list of tables bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 7 list of tables table 1: power control pin summary.............................................................................................. ................ 20 table 2: otp programming supply voltage requirements ............................................................................ 27 table 3: pcm interface time slotting scheme ..................................................................................... ........... 29 table 4: crystal interface signal characteristics ............................................................................... .............. 35 table 5: external lpo signal requirements ....................................................................................... ............ 39 table 6: bcm20705 signal descriptions ........................................................................................... .............. 40 table 7: ball-out for the 50-ball wfbga ......................................................................................... ............... 43 table 8: absolute maximum voltages .............................................................................................. ............... 44 table 9: power supply........................................................................................................... .......................... 45 table 10: high-voltage regulator (hv ldo) elec trical specifications ............................................................ 4 5 table 11: main regulator (main ldo) electrical specifications ................................................................... ... 45 table 12: digital i/o characteristics ........................................................................................... ..................... 46 table 13: pad i/o characteristics ............................................................................................... ..................... 46 table 14: usb interface level ................................................................................................... ...................... 47 table 15: current consumption?class 1(10 dbm) ................................................................................... ..... 48 table 16: current consumption?class 2 (3 dbm) ................................................................................... ...... 49 table 17: operating conditions .................................................................................................. ..................... 49 table 18: receiver rf specifications, .......................................................................................... .................. 50 table 19: transmitter rf specifications , ...................................................................................... ................. 52 table 20: usb full-speed timing specifications .................................................................................. .......... 56 table 21: uart timing specifications ............................................................................................ ................ 57 table 22: pcm interface timing specifications (short frame synchronization, master mode) ...................... 58 table 23: pcm interface timing specifications (short frame synchronization, slave mode) ........................ 59 table 24: pcm interface timing specifications (long frame synchronization, master mode)....................... 60 table 25: pcm interface timing specifications (long frame synchronization, slave mode)......................... 61 table 26: bsc interface timing specifications................................................................................... ............. 62 broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 8 bcm20705 data sheet broadcom confidential about this document purpose and audience this document provides engineering design information for the broadcom? bcm20705, a single-chip bluetooth transceiver and baseband processor that provides a complete lower layer bluetooth protocol stack. the information provided is intended for hardware design engineers who will be incorporating the bcm20705 into their designs. acronyms and abbreviations in most cases, acronyms and abbreviations are defined on first use. for a comprehensive list of acronyms and other terms used in broadcom documents, go to: http://www.broadcom.com/press/glossary.php . document conventions the following conventions may be used in this document: technical support broadcom provides customer access to a wide range of information, including technical documentation, schematic diagrams, product bill of materials, pcb layout information, and software updates through its customer support portal ( https://support.broadcom.com ). for a csp account, contact your sales or engineering support representative. in addition, broadcom provides other product support through its downloads and support site ( http://www.broadcom.com/support/ ). convention description bold user input and actions: for example, type exit , click ok, press alt+c monospace code: #include command line commands and parameters: wl [-l] |
overview bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 9 section 1: overview the broadcom? bcm20705 complies with bluetooth core specification, version 4.1 and is designed for use in standard host controller interface (hci) uart and hci usb applications. the combination of the bluetooth baseband core (bbc), a peripheral transport unit (ptu), and an arm ? -based microprocessor with on-chip rom provides a complete lower layer bluetooth protocol stack, including the link controller (lc), link manager (lm), and hci. major features major features of the bcm20705 include: ? support for bluetooth 4.1 + edr including the following options: ? a whitelist size of 25. ? enhanced power control ? hci read encryption key size command ? full support for bluetooth 2.1 + edr additional features: ? secure simple pairing (ssp) ? encryption pause resume (epr) ? enhance inquiry response (eir) ? link supervision time out (lsto) ? sniff subrating (ssr) ? erroneous data (ed) ? packet boundary flag (pbf) ? built-in low drop-out (ldo) regulators (2) ? 1.63 to 5.5v input voltage range ? 1.8 to 3.3v intermediate programmable output voltage ? integrated rf section ? single-ended, 50 ohm rf interface ? built-in tx/rx switch functionality ? tx class 1 output power capability ? rx sensitivity basic rate of ?88 dbm ? rx sensitivity for low energy of ?92 dbm ? supports maximum bluetooth data rates over hci uart, usb, and spi interfaces ? multipoint operation, with up to 7 active slaves ? maximum of 7 simultaneous active acl links ? maximum of 3 simultaneous active sco and esco links, with scatternet support ? scatternet operation, with up to 4 active piconets (with background scan and support for scattermode) major features bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 10 ? high-speed hci uart transport support ? h4 five-wire uart (four signal wires, one ground wire) ? h5 three-wire uart (two signal wires, one ground wire) ? maximum uart baud rates of 4 mbps ? low-power out-of-band bt_wake and host_wake signaling ? vsc from host transport to uart ? proprietary compressing scheme (allows more than 2 simultaneous a2dp packets and up to 5 devices at a time) ? hci usb transport support ? usb version 2.0 full-speed compliant interface ? full usb hub ? uhe (proprietary method for emulating a human interface device (hid) at system bootup) ? channel quality-driven data rate (cqddr) and packet type selection ? standard bluetooth test modes ? extended radio and production test mode features ? full support for power savings modes: ? bluetooth standard sniff ? deep sleep modes and regulator shutdown ? supports wide-band speech (wbs) over pcm and packet loss concealment (plc) for better audio quality ? 2-, 3-, and 4-wire coexistence ? power amplifier (pa) shutdown for externally controlled coexistence, such as wimax ? built-in lpo clock or operation using an external lpo clock ? tcxo input and auto-detection of all standard handset clock frequencies (supports low-power crystal, which can be used during power saving mode with better timing accuracy) ? or gate for combining a host clock request with a bluetooth clock request (operates even when the bluetooth core logic is powered off) ? larger patch ram space to support future enhancements ? serial flash interface with native support for devices from several manufacturers ? one-time programmable (otp) memory broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 11 block diagram broadcom confidential bcm20705 data sheet block diagram figure 2 shows the interconnect of the major bcm20705 physical blocks and associated external interfaces. figure 2: functional block diagram arm7tdmi-s dma scan jtag address decoder bus arb trap & patch ahb2apb wd timer remap & pause 32-bit apb 32-bit ahb ahb2mem ahb2ebi external bus i/f rom ahb2mem ram pmu control uart debug uart ptu i/o port control pmu lpo por buffer apu bt clk/ hopper blue rf i/f rx/tx buffer digital modulator calibration & control digital demod bit sync bluetooth radio rf flash i/f jtag digital i/o spi transport i2c_master interrupt controller pcm usb gpio+aux sw timers jtag master lcu fifo 1 fifo 2 otp (128 bytes) spi master seci coex low power scan blue rf registers usage model bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 12 usage model this section contains information on the pc product usage model . pc product usage model the bcm20705 can be directly interfaced using the hci usb interface, providing full support for embedded usb applications like laptops and pc motherboards. the bcm20705 also supports pc applications as an external usb dongle peripheral device. figure 3 shows an example of a pc product usage model. figure 3: pc product usage model host pc flash memory ieee 802.11? wlan usb optional/status bt_busy/tx_req wifi_busy/tx_confirm link_ind 20 mhz crystal oscillator serial interface vdd_usb integrated radio transceiver bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 13 section 2: integrated radio transceiver the bcm20705 has an integrated radio transceiver that has been optimized for use in 2.4 ghz bluetooth wireless systems. it has been designed to provide low-power, low-cost, robust communications for applications operating in the globally available 2.4 ghz unlicensed ism band. the bcm20705 is fully compliant with the bluetooth radio specification and enhanced data rate specification and meets or exceeds the requirements to provide the highest communication link quality of service. transmitter path the bcm20705 features a fully integrated zero if transmitter. the baseband transmitted data is digitally modulated in the modem block and up-converted to the 2.4 ghz ism band in the transmitter path. the transmitter path consists of signal filtering, i/q up-conversion, a high-output power amplifier (pa), and rf filtering. the bcm20705 also incorporates modulation schemes to support enhanced data rates. ? p/4-dqpsk for 2 mbps ? 8-dpsk for 3 mbps digital modulator the digital modulator performs the data modulation and filtering required for the gfsk, ? /4dqpsk, and 8- dpsk signals. the fully digital modulator minimizes any frequency drift or anomalies in the modulation characteristics of the transmitted signal and is much more stable than direct vco modulation schemes. power amplifier the bcm20705 integrated pa can be configured for class 2 operation, transmitting up to +4 dbm. the pa can also be configured for class 1 operation, transmitting up +10 dbm at the chip in gfsk mode, when a minimum supply voltage of 2.5v is applied to vddtf. because of the linear nature of the pa, combined with integrated filtering, minimal external filtering is required to meet bluetooth and regulatory harmonic and spurious requirements. using a highly linearized, temperature compensated design, the pa can transmit +10 dbm for basic rate and +8 dbm for enhanced data rates (2 to 3 mbps). a flexible supply voltage range allows the pa to operate from 1.2v to 3.3v. a minimum supply voltage of 2.5v is required at vddtf to achieve +10 dbm of transmit power. receiver path bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 14 receiver path the receiver path uses a low if scheme to downconvert the received signal for demodulation in the digital demodulator and bit synchronizer. the receiver path provides a high degree of linearity, an extended dynamic range, and high order on-chip channel filtering to ensure reliable operation in the noisy 2.4 ghz ism band. the front-end topology, with built-in out-of-band attenuation, enables the device to be used in most applications without off-chip filtering. for integrated handset operation where the bluetooth function is integrated close to the cellular transmitter, minimal external filtering is required to eliminate the desensitization of the receiver by the cellular transmit signal. digital demodulator and bit synchronizer the digital demodulator and bit synchronizer uses the low if received signal to perform an optimal frequency tracking and bit synchronization algorithm. receiver signal strength indicator the bcm20705 radio provides a receiver signal strength indicator (rssi) signal to the baseband so that the controller can take part in a bluetooth power-controlled link by providing a metric of its own receiver signal strength to determine whether the transmitter should increase or decrease its output power. local oscillator generation local oscillator (lo) generation provides fast frequency hopping (1600 hops/second) across the 79 maximum available channels. the lo generation subblock employs an architecture for high immunity to lo pulling during pa operation. the device uses fully-integrated pll loop filters. calibration the radio transceiver features an automated calibration scheme that is fully self-contained in the radio. user interaction is not required during normal operation or during manufacturing to provide the optimal performance. calibration optimizes the performance of all major blocks in the radio, including gain and phase characteristics of filters, matching between key components, and key gain blocks. calibration, which takes process and temperature variations into account, occurs transparently during the settling time of the hops, adjusting for temperature variations as the device cools and heats during normal operation. internal ldo bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 15 internal ldo two internal low drop-out (ldo) voltage regulators eliminate the need for external voltage regulators and therefore reduce the bom. the first ldo is a preregulator (hv ldo). the second ldo (main ldo) supplies the main power to the bcm20705 (see figure 4 ). the hv ldo has an input voltage range of 2.3v to 5.5v. the input vbat is ideal for batteries. the vreghv output is programmable from 1.8v to 3.3v, in 100 mv steps. the dropout voltage is 200 mv. the hv ldo can supply up to 95 ma, which leaves spare power for external circuitry such as an rf power amp for higher transmit power. if the hv ldo is not used, to turn off the hv ldo and minimize current consumption, connect the vbat input to the vreghv output. firmware can then disable the hv ldo, saving the quiescent current. the hv ldo default output voltage is 2.9v, allowing this regulator to be used to power external nv memory devices, as well as the vddo rail. the firmware can then adjust this output to as low as 1.8v, if desired, to power vddtf. the main ldo has a 1.22v output (vreg) and is used to supply main power to the bcm20705. the input of this ldo (vreghv) has an input voltage range of from 1.63v to 3.63v. the output of the hv ldo is internally connected to the input to the main ldo. power can be applied to vreghv when the hv ldo is not used. the main ldo supplies power to the entire device for class 2 operation. the main ldo can drive up to 60 ma, which leaves spare power for external circuitry. the main ldo is bypassed by not connecting anything to its output (vreg) and driving 1.12v?1.32v directly to vddc and vddrf. reg_en provides a control signal for the host to control power to the bcm20705. when power is enabled, the bcm20705 will require complete initialization. figure 4: ldo functional block diagram hv ldo main ldo vreghv vbat vreg reg_en bluetooth baseband core bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 16 section 3: bluetooth baseband core the bluetooth baseband core (bbc) implements the time critical functions required for high-performance bluetooth and low energy operation. the bbc manages buffering, segmentation, and data routing for all connections. it also buffers data that passes through it, handles data flow control, schedules sco/acl tx/rx transactions, monitors bluetooth slot usage, optimally segments and packages data into baseband packets, manages connection status indicators, and composes and decodes hci packets. in addition to these functions, it independently handles hci event types and hci command types. transmit and receive functions the following transmit and receive functions are implemented in the bbc hardware to increase the reliability and security of the tx/rx data before sending the data over the air: in the transmitter: ? data framing ? forward error correction (fec) generation ? header error control (hec) generation ? cyclic redundancy check (crc) generation ? key generation ? data encryption ? data whitening in the receiver: ? symbol timing recovery ? data deframing ?fec ?hec ? crc ? data decryption ? data dewhitening bluetooth 4.1 + edr features bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 17 bluetooth 4.1 + edr features the bcm20705 supports bluetooth 4.1 + edr and low energy, including the following options: ? a whitelist size of 25 ? enhanced power control ? hci read encryption key size command the bcm20705 provides full support for bluetooth 2.1 + edr additional features: ? secure simple pairing (ssp) ? encryption pause resume (epr) ? enhance inquiry response (eir) ? link supervision time out (lsto) ? sniff subrating (ssr) ? erroneous data (ed) ? packet boundary flag (pbf) frequency hopping generator the frequency hopping sequence generator selects the correct hopping channel number, based on the link controller state, bluetooth clock, and device address. link control layer the link control layer is part of the bluetooth link control functions implemented in dedicated logic in the link control unit (lcu). this layer consists of the command controller that takes commands from the software and other controllers that are activated or configured by the command controller to perform the link control tasks. there are two major states?standby and connection. each task establishes a different state in the bluetooth link controller. in addition, there are eight substates?page, page scan, inquiry, inquiry scan, sniff, and sniff subrating. test mode support bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 18 test mode support the bcm20705 fully supports bluetooth test mode. in addition to the standard bluetooth test mode, the device supports enhanced testing features to simplify rf debugging and qualification and type approval testing. these test features include: ? fixed frequency carrier wave (unmodulated) transmission ? simplifies some type approval measurements (japan) ? aids in transmitter performance analysis ? fixed frequency constant receiver mode ? directs receiver output to i/o pin ? allows for direct ber measurements using standard rf test equipment ? facilitates spurious emissions testing for receive mode ? fixed frequency constant bit stream transmission ? unmodulated, 8-bit fixed pattern, prbs-9, or prbs-15 ? enables modulated signal measurements with standard rf test equipment ? packetized connectionless transmitter test ? hopping or fixed frequency ? multiple packet types supported ? multiple data patterns supported ? packetized connectionless receiver test ? fixed frequency ? multiple packet types supported ? multiple data patterns supported power management unit bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 19 power management unit the power management unit (pmu) provides power management features that can be invoked through power management registers or packet handling in the baseband core. this section contains descriptions of the pmu features. rf power management the bbc generates power-down control signals for the transmit path, receive path, pll, and power amplifier to the 2.4 ghz transceiver. the transceiver then processes the power-down functions, accordingly. host controller power management the host can place the device in a sleep state, in which all nonessential blocks are powered off and all nonessential clocks are disabled. power to the digital core is maintained so that the state of the registers and ram is not lost. in addition, the lpo clock is applied to the internal sleep controller so that the chip can wake automatically at a specified time or based on signaling from the host. the goal is to limit the current consumption to a minimum, while maintaining the ability to wake up and resume a connection with minimal latency. if a scan or sniff session is enabled while the device is in sleep mode, the device automatically will wake up for the scan/sniff event, then go back to sleep when the event is done. in this case, the device uses its internal lpo- based timers to trigger the periodic wake up. while in sleep mode, the transports are idle. however, the host can signal the device to wake up at any time. if signaled to wake up while a scan or sniff session is in progress, the session continues but the device will not sleep between scan/sniff events. once sleep mode is enabled, the wake signaling mechanism can also be thought of as a sleep signaling mechanism, since removing the wake status will often cause the device to sleep. in addition to a bluetooth device wake signaling mechanism, there is a host wake signaling mechanism. this feature provides a way for the bluetooth device to wake up a host that is in a reduced power state. there are two mechanisms for the device and the host to signal wake status to each other: when running in spi mode, the bcm20705 has a mode where it enters sleep mode when there is no activity on the spi interface for a specified (programmable) amount of time. idle mode is detected when the spi_csn is left deasserted. whether to sleep on an idle interface and the amount of time to wait before entering sleep mode can be programed by the host. once the bcm20705 enters sleep, the host can wake it by asserting spi_csn. if the host decides to sleep, the bcm20705 will wake up the host by asserting spi_int when it has data for it. usb when running in usb mode, the device supports the usb version 2.0 full-speed specification, suspend/resume signaling, as well as remote wake-up signaling for power control. bluetooth wake (bt_wake) and host wake (and host_wake) signaling the bt_wake pin (gpio_0) allows the host to wake the bt device, and host_wake (gpio_1) is an output that allows the bt device to wake the host. power management unit bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 20 note: successful operation of the power management handshaking signals requires coordinated support between the device firmware and the host software. table 1: power control pin summary pin direction description bt_wake (gpio_0) host output bt input bluetooth device wake-up: signal from the host to the bluetooth device that the host requires attention. ? asserted = bluetooth device must wake up or remain awake. ? deasserted = bluetooth device may sleep when sleep criteria are met. the polarity of this signal is software configurable and can be asserted high or low. by default, bt_wake is active-low (if bt-wake is low it requires the device to wake up or remain awake). for usb applications, this can be used for setting airport mode (radio disable mode). host_wake (gpio_1) bt output host input host wake-up. signal from the bluetooth device to the host indicating that bluetooth device requires attention. ? asserted = host device must wake up or remain awake. ? deasserted = host device may sleep when sleep criteria are met. the polarity of this signal is software configurable and can be asserted high or low. clk_req (gpio_5) bt output clock request ? asserted = external clock reference required ? deasserted = external clock reference may be powered down for the bcm20705a1kwfbg, the polarity of clk_req is active low. for bcm20705b0kwfbg, the clk_req function is only available as a configurable feature after firmware boot, which means it cannot be used to request a clock at boot time. reg_en bt input enables the internal preregulator and main regulator outputs. reg_en is active-high. ? 1 = enabled ? 0 = disabled power management unit bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 21 bbc power management the device provides the following low-power operations for the bbc: ? physical layer packet handling turns rf on and off dynamically within packet tx and rx. ? bluetooth specified low-power connection mode (sniff). while in this low-power connection mode, the device runs on the low power oscillator and wakes up after a predefined time period. backdrive protection the bcm20705 provides a backdrive protection feature that allows the device to be turned off while the host and other devices in the system remain operational. when the device is not needed in the system, vdd_rf and vddc are shut down and vddo remains powered. this allows the device to be effectively off, while keeping the i/o pins powered so that they do not draw extra current from other devices connected to the i/o. during the low power shutdown state and as long as vddo remains applied to the device, all outputs are tristated and all digital and analog clocks are disabled. input voltages must remain within the limits defined for normal operation. this is done to either prevent current draw and back loading on digital signals in the system. it also enables the device to be fully integrated in an embedded device and take full advantage of the lowest power savings modes. if vddc is powered up externally (not connected to vreg), vddc requires 750k ohms to ground during low-power shutdown. if vddc is powered up by vreg, vddc does not require 750k ohms to ground because the internal main ldo has about 750 k ohms to ground when turned off. several signals, including the frequency reference input (xtal_in) and external lpo input (lpo_in), are designed to be high-impedance inputs that will not load down the driving signal, even if vddo power is not applied to the chip. the other signals with back drive prevention are rst_n, coex_in, pcm_sync, pcm_clk, pcm_out, pcm_in, uart_rts_n, uart_cts_n, uart_rxd, uart_txd, gpio_0, gpio_1, gpio_4, gpio_7, husb_dp, husb_dn, cfg_sel, and otp_dis. all other i/o signals must remain at vss until vddo is applied. failing to do this can result in unreliable startup behavior. when powered on, using reg_en is the same as applying power to the bcm20705. the device does not have information about its state before being powered-down. note: vdd_rf collectively refers to the vddtf, vddif, vddlna, vddpx, and vddrf rf power supplies. note: never apply voltage to i/o pins if vddo is not applied. adaptive frequency hopping bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 22 adaptive frequency hopping the bcm20705 supports host channel classification and dynamic channel classification adaptive frequency hopping (afh) schemes, as defined in the bluetooth specification. host channel classification enables the host to set a predefined hopping map for the device to follow. if dynamic channel classification is enabled, the device gathers link quality statistics on a channel-by-channel basis to facilitate channel assessment and channel map selection. to provide a more accurate frequency hop map, link quality is determined using both rf and baseband signal processing. collaborative coexistence the bcm20705 provides extensions and collaborative coexistence to the standard bluetooth afh for direct communication with wlan devices. collaborative coexistence enables wlan and bluetooth to operate simultaneously in a single device. the device supports industry-standard coexistence signaling, including 802.15.2, and supports broadcom and third-party wlan solutions. using a multitiered prioritization approach, relative priorities between data types and applications can be set. this approach maximizes the performance-wlan data throughput vs. voice quality vs. link performance. a pa shutdown pin is available to allow full external control of the rf output for other types of coexistence, such as wimax. serial enhanced coexistence interface the serial enhanced coexistence interface (serial eci or seci) is a proprietary broadcom interface between broadcom wlan devices and bluetooth devices. it is an optional replacement to the legacy 3- or 4-wire coexistence feature, which is also available. the following key features are associated with the interface: ? enhanced coexistence data can be exchanged over a two-wire interface, one serial input (seci_in), and one serial output (seci_out). the pad configuration registers must be programmed to choose the digital i/ o pins that serve the seci_in and seci_out function. ? it supports generic uart communication between wlan and bluetooth devices. ? to conserve power, it is disabled when inactive. ? it supports automatic resynchronizaton upon waking from sleep mode. ? it supports a baud rate of up to 4 mbps. serial enhanced coexistence interface bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 23 seci advantages the advantages of the seci over the legacy 3-wire coexistence interface are: ? only two wires are required: seci_in and seci_out. ? up to 48-bits of coexistence data can be exchanged. previous broadcom standalone bluetooth devices such as the bcm2070 supported only a 3-wire or 4-wire coexistence interface. previous broadcom wlan and bluetooth combination devices such as the bcm4325, bcm4329, and bcm4330 support an internal parallel enhanced coexistence interface for more efficient wlan and bluetooth information exchange. the seci allows enhanced coexistence information to be passed to a companion broadcom wlan chip through a serial interface using fewer i/o than the 3-wire coexistence scheme. the 48-bits of the seci significantly enhance wlan and bluetooth coexistence by sharing such information as frequencies used and radio usage times. the exact contents of the seci are broadcom confidential. seci i/o the bcm20705 does not have dedicated seci_in or seci_out pins, but the two pin functions can be mapped to the following digital i/o: the uart, gpio, spi master (or bsc), pcm, and coex pins. pin function mapping is controlled by the config file that is either stored in nvram or downloaded directly into on-chip ram from the host. microprocessor unit bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 24 section 4: microprocessor unit overview the bcm20705 microprocessor unit runs software from the link control (lc) layer up to the host controller interface (hci). the microprocessor is based on the arm7tdmis 32-bit risc processor with embedded ice- rt debug and jtag interface units. the microprocessor also includes 448 kb of rom memory for program storage and boot rom, 132 kb of ram for data scratch-pad, and patch ram code. the internal boot rom provides flexibility during power-on reset to enable the same device to be used in various configurations, including automatic host transport selection from spi, usb, or uart, with or without external nvram. at power-up, the lower layer protocol stack is executed from the internal rom. external patches can be applied to the rom-based firmware to provide flexibility for bug fixes and features additions. these patches can be downloaded from the host to the device through the spi, usb, or uart transports, or using external nvram. the device can also support the integration of user applications and profiles using an external serial flash memory. note: the bcm20705a1kwfbg part only contains 384 kb of rom and 112 kb of ram. nvram configuration data and storage bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 25 nvram configuration data and storage serial interface the bcm20705 includes an spi master controller that can be used to access serial flash memory. the spi master contains an ahb slave interface, transmit and receive fifos, and the spi core phy logic. data is transferred to and from the module by the system cpu. dma operation is not supported. the bcm20705 supports serial flash vendors atmel?, mxic, and numonyx?. the most commonly used parts from two of these vendors are: ? at25bcm512b, manufactured by atmel ? mx25v512zui-20g, manufactured by mxic eeprom the bcm20705 includes a broadcom serial control (bsc) master interface. the bsc interface supports low- speed and fast mode devices and is compatible with i 2 c slave devices. multiple i 2 c master devices and flexible wait state insertion by the master interface or slave devices are not supported. the bcm20705 provides 400 khz, full speed clock support. the bsc interface is programmed by the cpu to generate the following bsc transfer types on the bus: ? read-only ?write-only ? combined read/write ? combined write-read nvram may contain configuration information about the customer application, including the following: ? fractional-n information ?bd_addr ? uart baud rate ? usb enumeration information ? sdp service record ? file system information used for code, code patches, or data external reset the bcm20705 has an integrated power-on reset circuit which completely resets all circuits to a known power on state. this action can also be driven by an external reset signal, which can be used to externally control the device, forcing it into a power-on reset state. the rst_n signal input is an active-low signal for all versions of the bcm20705. the bcm20705 requires an external pull-up resistor on the rst_n input. alternatively, the rst_n input can be connected to reg_en or driven directly by a host gpio. one-time programmable memory bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 26 one-time programmable memory the bcm20705 includes a one-time programmable (otp) memory, allowing manufacturing customization and avoiding the need for an on-board nvram.if customization is not required, then the otp does not need to be programmed. whether the otp is programmed or not, it is disabled after the boot process completes to save power. the otp size is 128 bytes. the otp is designed to store a minimal amount of information. aside from otp data, most user configuration information will be downloaded into ram after the bcm20705 boots up and is ready for host transport communication. the otp contents are limited to: ? parameters required prior to downloading user configuration to ram. ? parameters unique to each part and each customer (i.e., the bd_addr, software license key, and usb pid/vid). the otp memory is particularly useful in a pc design with usb transport capability because: ? some customer-specific information must be configured before enumerating the part on the usb transport. ? part or customer unique information (bd_addr, software license key, and usb pid/vid) do not need to be stored on the host system. one-time programmable memory bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 27 contents the following are typical parameters programmed into the otp memory: ?bd_addr ? software license key ? usb pid/vid ? usb bus/self-powered status ? output power calibration ? frequency trimming ? initial status led drive configuration the otp contents also include a static error correction table to improve yield during the programming process as well as forward error correction codes to eliminate any long-term reliability problems. the otp contents associated with error correction are not visible by customers. programming otp memory programming takes place through a combination of broadcom software integrated with the manufacturing test software and code embedded in bcm20705 firmware. programming the otp requires a 3.3v supply. the otp programming supply comes from the vdd_usb pin. for applications where the otp is most useful, such as the usb transport application for the pc market, the 3.3v is already required for usb operation from the vdd_usb pin. the otp power supply is allowed to be as low as 1.8 v to be able to read the contents. see ta b le 2 for the otp memory programming supply voltage requirements. the otp is enabled by default by setting otp_dis to low using an internal pull-down resistor. leave this pin floating for a default configuration. to disable the otp, set the otp_dis pin to active high. this pin can be configured from the hw to enable or disable otp. typically it won?t be necessary to disable the otp memory, even if it is not programmed during manufacturing. the otp_dis package ball only needs to be tied to high if recommended by broadcom. table 2: otp programming supply voltage requirements a a. the average and peak current consumptions during otp memory programming are 20 ma and 70 ma, respectively. supply minimum b b. contact your broadcom representative for recommended minimum and maximum supply voltages. typical maximum b unit vdd_usb tbd tbd tbd v peripheral transport unit bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 28 section 5: peripheral transport unit this section discusses the pcm, usb, uart, and spi peripheral interfaces. the bcm20705 has a 1040 byte transmit and receive fifo, which is large enough to hold the entire payload of the largest edr bt packet (3-dh5). pcm interface the bcm20705 pcm interface can connect to linear pcm codec devices in master or slave mode. in master mode, the device generates the pcm_bclk and pcm_sync signals. in slave mode, these signals are provided by another master on the pcm interface as inputs to the device. the device supports up to three sco or esco channels through the pcm interface and each channel can be independently mapped to any available slot in a frame. the host can adjust the pcm interface configuration using vendor-specific hci commands or it can be setup in the configuration file. system diagram figure 5 shows options for connecting the device to a pcm codec device as a master or a slave. figure 5: pcm interface with linear pcm codec pcm interface slave mode pcm codec (master) pcm_in pcm_bclk pcm_sync pcm_out pcm interface master mode pcm codec (slave) pcm_in pcm_bclk pcm_sync pcm_out pcm interface hybrid mode pcm codec (hybrid) pcm_in pcm_bclk pcm_sync pcm_out bcm20705 (slave) bcm20705 (master) bcm20705 (hybrid) pcm interface bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 29 slot mapping the device supports up to three simultaneous, full-duplex sco or esco channels. these channels are time- multiplexed onto the pcm interface using a time slotting scheme based on the audio sampling rate, as described in ta b l e 3 . transmit and receive pcm data from an sco channel is always mapped to the same slot. the pcm data output driver tri-states its output on unused slots to allow other devices to share the same pcm interface signals. the data output driver tri-states its output after the falling edge of the pcm clock during the last bit of the slot. wideband speech the bcm20705 provides support for wideband speech (wbs) in two ways: ? transparent mode the host encodes wbs packets and the encoded packets are transferred over the pcm bus for sco or esco voice connections. in transparent mode, the pcm bus is typically configured in master mode for a 4 khz sync rate with 16-bit samples, resulting in a 64 kbps bit rate. ? on-chip smartaudio? technology the bcm20705 can perform subband-codec (sbc) encoding and decoding of linear 16 bits at 16 khz (256 kbps rate) transferred over the pcm bus. table 3: pcm interface time slotting scheme audio sample rate time slotting scheme 8 khz the number of slots depends on the selected interface rate, as follows: interface rate slot 128 1 256 2 512 4 1024 8 2048 16 16 khz the number of slots depends on the selected interface rate, as follows: interface rate slot 256 1 512 2 1024 4 2048 8 hci transport detection configuration bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 30 frame synchronization the device supports both short and long frame synchronization types in both master and slave configurations. in short frame synchronization mode, the frame synchronization signal is an active-high pulse at the 8 khz audio frame rate (which is a single bit period in width) and synchronized to the rising edge of the bit clock. the pcm slave expects pcm_sync to be high on the falling edge of the bit clock and the first bit of the first slot to start at the next rising edge of the clock. in the long frame synchronization mode, the frame synchronization signal is an active-high pulse at the 8 khz audio frame rate. however, the duration is 3-bit periods and the pulse starts coincident with the first bit of the first slot. data formatting the device can be configured to generate and accept several different data formats. the device uses 13 of the 16 bits in each pcm frame. the location and order of these 13 bits is configurable to support various data formats on the pcm interface. the remaining three bits are ignored on the input, and may be filled with zeros, ones, a sign bit, or a programmed value on the output. the default format is 13-bit two?s complement data, left justified, and clocked most significant bit first. hci transport detection configuration the bcm20705 supports the following interface types for the hci transport from the host: ? uart (h4 and h5) ?usb ?spi only one host interface can be active at a time. the firmware performs a transport detect function at boot-time to determine which host is the active transport. it can auto-detect uart and usb interfaces, but the spi interface must be selected by strapping the scl pin to 0. the complete algorithm is summarized as follows: 1. determine if scl is pulled low. if it is, select spi as hci host transport. 2. determine if any local nvram contains a valid configuration file. if it does and a transport configuration entry is present, select the active transport according to entry, and then exit the transport detection routine. 3. look for start-of-frame (sof) on the usb interface. if it is present, select usb. 4. look for cts_n = 0 on the uart interface. if it is present, select uart. 5. repeat step 3 and step 4 until transport is determined. usb interface bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 31 usb interface features the following usb interface features are supported: ? usb protocol, revision 2.0, full-speed compliant including the hub ? optional hub compound device with up to three device cores internal to device. ? bus or self-power, dynamic configuration for the hub ? global and selective suspend and resume with remote wakeup ? bluetooth hci ? hid, dfu, uhe (proprietary method to emulate an hid device at system boot) ? integrated detach resistor operation the bcm20705 can be configured to boot up as either a single usb peripheral or a usb hub with several usb peripherals attached. as a single peripheral, the host detects a single usb bluetooth device. in hub mode, the host detects a hub with one to three of the ports already connected to usb devices (see figure 6 ). figure 6: usb compounded device configuration depending on the desired hub mode configuration, the bcm20705 can boot up showing the three ports connected to logical usb devices internal to the bcm20705?a generic bluetooth device, a mouse, and a keyboard. in this mode, the mouse and keyboard are emulated devices, since they connect to real hid devices via a bluetooth link. the bluetooth link to these hid devices is hidden from the usb host. to the host, the mouse and/or keyboard appear to be directly connected to the usb port. this broadcom proprietary architecture is called usb hid emulation (uhe). note: the usb and hci uart interfaces cannot be used simultaneously. for designs that do not use the usb interface, vdd_usb, husb_dp and husb_dn must be connected to ground. usb compounded device hub controller usb device 1 hid keyboard usb device 2 hid mouse usb device 3 bluetooth host usb interface bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 32 the usb device, configuration, and string descriptors are fully programmable, allowing manufacturers to customize the descriptors, including vendor and product ids, the bcm20705 uses to identify itself on the usb port. to make custom usb descriptor information available at boot time, stored it in external nvram. despite the mode of operation (single peripheral or hub), the bluetooth device is configured to include the following interfaces: usb hub and uhe support the bcm20705 supports the usb hub and device model (usb, revision 2.0, full-speed compliant). optional mouse and keyboard devices utilize broadcom?s proprietary usb hid emulation (uhe) architecture, which allows these devices appear as standalone hid devices even though connected through a bluetooth link. the presence of uhe devices requires the hub to be enabled. the bcm20705 cannot appear as a single keyboard or a single mouse device without the hub. once either mouse or keyboard uhe device is enabled, the hub must also be enabled. when the hub is enabled, the bcm20705 handles all standard usb functions for the following devices: ? hid keyboard ? hid mouse ? bluetooth all hub and device descriptors are firmware-programmable. this usb compound device configuration (see figure 6 on page 31 ) supports up to three downstream ports. this configuration can also be programmed to a single usb device core. the device automatically detects activity on the usb interface when connected. therefore, no special configuration is needed to select hci as the transport. the hub?s downstream port definition is as follows: ? port 1 usb lite device core (for hid applications) ? port 2 usb lite device core (for hid applications) ? port 3 usb full device core (for bluetooth applications) when operating in hub mode, all three internal devices do not have to be enabled. each internal usb device can be optionally enabled. the configuration record in nvram determines which devices are present. interface 0 contains a control endpoint (endpoint 0x00) for hci commands, a bulk in endpoint (endpoint 0x82) for receiving acl data, a bulk out endpoint (endpoint 0x02) for transmitting acl data, and an interrupt endpoint (endpoint 0x81) for hci events. interface 1 contains isochronous in and out endpoints (endpoints 0x83 and 0x03) for sco traffic. several alternate interface 1 settings are available for reserving the proper bandwidth of isochronous data (depending on the application). interface 2 contains bulk in and bulk out endpoints (endpoints 0x84 and 0x04) used for proprietary testing and debugging purposes. these endpoints can be ignored during normal operation. uart interface bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 33 uart interface the uart physical interface is a standard, 4-wire interface (rx, tx, rts, cts) with adjustable baud rates from 9600 bps to 4.0 mbps. the interface features an automatic baud rate detection capability that returns a baud rate selection. alternatively, the baud rate can be selected via a vendor-specific uart hci command. the interface supports bluetooth uart hci (h4) specifications. the default baud rate for h4 is 115.2 kbaud. the following baud rates are supported: ? 9600 ? 14400 ? 19200 ? 28800 ? 38400 ? 57600 ? 115200 ? 230400 ? 460800 ? 921600 ? 144444 ? 150000 ? 2000000 ? 3000000 ? 3250000 ? 3692000 ? 4000000 normally, the uart baud rate is set by a configuration record downloaded after reset or by automatic baud rate detection. the host does not need to adjust the baud rate. support for changing the baud rate during normal hci uart operation is provided through a vendor-specific command. the bcm20705 uart operates with the host uart correctly, provided the combined baud rate error of the two devices is within 2%. hci 3-wire transport (uart h5) the bcm20705 supports h5 uart transport for serial uart communications. h5 reduces the number of signal lines required by eliminating cts and rts, when compared to h4. h5 requires the use of an external lpo. cts must be pulled low. spi bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 34 spi the bcm20705 supports a slave spi hci transport with an input clock range of up to 16 mhz. higher clock rates may be possible. the physical interface between the spi master and the bcm20705 consists of the four spi signals (spi_csb, spi_clk, spi_si, and spi_so) and one interrupt signal (spi_int). the bcm20705 can be configured to accept active-low or active-high polarity on the spi_csb chip select signal. it can also be configured to drive an active-low or active-high spi_int interrupt signal. bit ordering on the spi_si and spi_so data lines can be configured as either little-endian or big-endian. additionally, proprietary sleep mode, half-duplex handshaking is implemented between the spi master and the bcm20705. spi_int is required to negotiate the start of a transaction. the spi interface does not require flow control in the middle of a payload. the fifo is large enough to handle the largest packet size. only the spi master can stop the flow of bytes on the data lines, since it controls spi_csb and spi_clk. flow control should be implemented in higher layer protocols. simultaneous uart transport and bridging the bcm20705 supports uart or usb interfaces that can function as the host controller interface (hci). typically, a customer application would choose one of the two interfaces and the other would be idle. the bcm20705 allows the uart transport to operate simultaneously with the usb. to operate this way, the assumption is that the usb would function as the primary host transport, while the uart would function as a secondary communication channel that can operate at the same time. this can enable the following applications: ? bridging primary hci transport traffic to another device via the uart ? generic communication to an external device for a vendor-supported application via the uart simultaneous uart transport and bridging is enabled by including: ? two dedicated 64-byte fifos, one for the input and one for the output ? additional dma channels ? additional vendor-supported commands over the hci transport frequency references bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 35 section 6: frequency references the bcm20705 uses two different frequency references for normal and low-power operational modes. an external crystal or frequency reference driven by a temperature compensated crystal oscillator (tcxo) signal is used to generate the radio frequencies and normal operation clocking. either an external 32.768 khz or fully integrated internal low-power oscillator (lpo) is used for low-power mode timing. crystal interface and clock generation the bcm20705 uses a fractional-n synthesizer to generate the radio frequencies, clocks, and data/packet timing, enabling it to operate from any of a multitude of frequency sources. the source can be external, such as a tcxo, or a crystal interfaced directly to the device. the default frequency reference setting is for a 20 mhz crystal or tcxo. the signal characteristics for the crystal interface are listed in table 4 on page 35 . table 4: crystal interface signal characteristics parameter crystal external frequency reference units acceptable frequencies 12?52 mhz in 2 ppm a steps a. the frequency step size is approximately 80 hz resolution. 12?52 mhz in 2 ppm a steps ? crystal load capacitance 12 (typical) n/a pf esr 60 (max) ? ? power dissipation 200 (max) ? w input signal amplitude n/a 400 to 2000 2000 to 3300 (requires a 10 pf dc blocking capacitor to attenuate the signal) mvp-p signal type n/a square-wave or sine-wave ? input impedance n/a 1 2 m ? pf phase noise @ 1 khz @ 10 khz @ 100 khz @ 1 mhz n/a n/a n/a n/a n/a ? < ?120 b < ?131 b < ?136 b < ?136 b ? dbc/hz dbc/hz dbc/hz dbc/hz auto-detection frequencies when using external lpo c 12, 13, 14.4, 15.36, 16.2, 16.8, 18, 19.2, 19.44, 19.68, 19.8, 20, 24, 26, 33.6, 37.4, and 38.4 12, 13, 14.4, 15.36, 16.2, 16.8, 18, 19.2, 19.44, 19.68, 19.8, 20, 24, 26, 33.6, 37.4, and 38.4 mhz tolerance without frequency trimming d 20 20 ppm initial frequency tolerance trimming range 50 50 ppm crystal interface and clock generation bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 36 b. with a 26 mhz reference clock. for a 13 mhz clock, subtract 6 db. for a 52 mhz clock, add 6 db. c. auto-detection of the frequency requires the crystal or external frequency reference to have less than 50 ppm of variation and also requires an external lpo frequency which has less than 250 ppm of variation at the time of detection. d. at-cut crystal or txco recommended. crystal oscillator bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 37 crystal oscillator the bcm20705 can use an external crystal to provide a frequency reference. the recommended configuration for the crystal oscillator, including all external components, is shown in figure 7 . figure 7: recommended os cillator configuration external frequency reference an external frequency reference, such as vdd_rf, collectively refers to several rf power supplies generated by a tcxo signal that may be directly connected to the crystal input pin on the bcm20705, as shown in figure 8 . the external frequency reference input is designed to not change loading on the tcxo when the bcm20705 is powered up or powered down. when using the bcm20705 with the txco or gate option, gpio 6 must be driven active high or active low. excessive leakage current results if gpio6 is allowed to float. figure 8: recommended tcxo connection 0 ~ 18 pf* 0 ~ 18 pf* xin xout crystal oscillator *capacitor value range depends on the manufacturer of the xtal as well as board layout. no connection tcxo xin xout 10?1000 pf* * recommended value is 100 pf. higher values produce a longer startup time. lower values have greater isolation. larger values help small signal swings. frequency selection bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 38 tcxo clock request support if the application utilizes an external tcxo as a clock reference, the bcm20705 provides a clock request output to allow the system to power off the tcxo when not in use. frequency selection any frequency within the range specified for the crystal and tcxo reference can be used. these frequencies include standard handset reference frequencies (12, 13, 14.4, 15.36, 16.2, 16.8, 18, 19.2, 19.44, 19.68, 19.8, 20, 24, 26, 33.6, 37.4, and 38.4 mhz) and any frequency between these reference frequencies, as desired by the system designer. since bit timing is derived from the reference frequency, the bcm20705 must have the reference frequency set correctly in order for any of the usb, uart, and pcm interfaces to function properly. the bcm20705 reference frequency can be set in one of the following ways. ? use the default 20 mhz frequency by leaving the cfg_sel pin unconnected or by strapping it high. the cfg_sel pin is internally pulled up in the bcm20705. ? use the 26 mhz option by setting cfg_sel low. ? designate the reference frequency in external nvram ? auto-detect the standard handset reference frequencies using an external lpo clock for pc and embedded applications where there typically won?t be an lpo clock, if autobaud is enabled, the bcm20705 will use xtal to sync up with the uart, thus allowing a user to download a firmware configuration without having to make a crystal frequency assumption. alternatively, the bcm20705 will upload the firmware configuration from an attached nvram (if one is attached) and use it to make a crystal frequency assumption. finally, if neither of the above is true, then the bcm20705 will look at the status of the cfg_sel pin and decide whether to choose 20 or 26 mhz. autobaud is only valid for uart applications. the 20 mhz choice is only a default in the sense that if the pin is left floating, it will be pulled up internally to support the 20 mhz option. if the application requires a frequency other than the default, the value can be stored in an external nvram. programming the reference frequency in nvram provides the maximum flexibility in the selection of the reference frequency, since any frequency within the specified range for crystal and external frequency reference can be used. during power-on reset (por), the device downloads the parameter settings stored in nvram, which can be programmed to include the reference frequency and frequency trim values. typically, this is how a pc bluetooth application is configured. for applications such as handsets and portable smart co mmunication devices, where t he reference frequency is one of the standard frequencies commonly used, the bcm20705 automatically detects the reference frequency and programs itself to the correct reference frequency. in order for auto-frequency detection to work properly, the bcm20705 must have a valid and stable 32.768 khz external lpo clock present during por. this eliminates the need for nvram in applications where the external lpo cloc k is available and an external nvram is typically not used. frequency trimming bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 39 frequency trimming the bcm20705 uses a fractional-n synthesizer to digitally fine-tune the frequency reference input to within 2 ppm tuning accuracy. this trimming function can be applied to either the crystal or an external frequency source such as a tcxo. unlike the typical crystal-trimming methods used, the bcm20705 changes the frequency using a fully digital implementation and is much more stable and unaffected by crystal characteristics or temperature. input impedance and loading characteristics remain unchanged on the tcxo or crystal during the trimming process and are unaffected by process and temperature variations. the option to use or not use frequency trimming is based on the system designer?s cost trade-off between bill- of-materials (bom) cost of the crystal and the added manufacturing cost associated with frequency trimming. the frequency trimming value can either be stored in the host and written to the bcm20705 as a vendor-specific hci command or stored in nvram and subsequently recalled during por. frequency trimming is not a substitute for the poor use of tuning capacitors at an crystal oscillator (xtal). occasionally, trimming can help alleviate hardware changes. lpo clock interface the lpo clock is the second frequency reference that the bcm20705 uses to provide low-power mode timing for sniff. the lpo clock can be provided to the device externally, from a 32.768 khz source or the bcm20705 can operate using the internal lpo clock. the lpo can be internally driven from the main clock. however, sleep current will be impacted. the accuracy of the internal lpo limits the maximum sniff intervals. table 5: external lpo signal requirements parameter external lpo clock units nominal input frequency 32.768 khz frequency accuracy 250 ppm input signal amplitude 200 to 3600 mvp-p signal type square-wave or sine-wave ? input impedance (when power is applied or power is off) >100 <5 k ? pf pin-out and signal descriptions bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 40 section 7: pin-out and signal descriptions pin descriptions table 6: bcm20705 signal descriptions signal wfbga pin (50-ball) i/o power domain description radio res f3 o vdd_rf external calibration resistor, 15 k ? @ 1% rfp d1 i/o vdd_rf rf i/o antenna port xin g2 i vdd_rf crystal or reference input xout g3 o vdd_rf crystal oscillator output analog lpo_in b4 i vddrf external lpo input voltage regulators reg_en b2 i vddo hv ldo and main enable vbat a3 i n/a hv ldo input vreghv a2 i/o n/a hv ldo output: main ldo input vreg a1 o n/a main ldo output straps cfg_sel b8 i/o vddo this pin is floating for the 20 mhz xtal option and tied to ground for the 26 mhz xtal option. otp_dis b7 i/o vddo otp disable pin. by default, leave this pin floating. rst_n a4 i vddo active-low reset input tm0 ? i vddo clock request polarity select tm1 ? i vddo internally connected to ground tm2 e3 i vddo reserved: connect to ground. digital i/o gpio_0 b5 i/o vddo gpio/bt_wake gpio_1 b3 i/o vddo gpio/host_wake. gpio_3 d8 i/o vddo gpio/link_ind note: can be configured for active high or low as well as open drain. gpio_4 ? i/o vddo gpio gpio_5 f4 i/o vddo gpio/clk_req tcxo-or function out available on some packages. see section 11: ?ordering information,? on page 65 . pin descriptions bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 41 gpio_6 e4 i/o vddo gpio tcxo-or function in available on some packages. see section 11: ?ordering information,? on page 65 . gpio_7 c7 i/o vddo detatch/card_detect uart_rxd d7 i/o vddo uart receive data uart_txd f6 i/o vddo uart transmit data uart_rts_n e5 i/o vddo uart request to send output uart_cts_n g7 i/o vddo uart clear to send input scl f7 i/o vddo bsc clock sda e7 i/o vddo bsc data spim_clk e8 i/o vddo serial flash spi clock spim_cs_n g8 i/o vddo serial flash active-low chip select pcm_in g6 i/o vddo pcm/i2s data input pcm_out f5 i/o vddo pcm/i2s data output pcm_clk g5 i/o vddo pcm/i2s clock pcm_sync c4 i/o vddo pcm sync/i2s word select coex_in b6 i/o vddo coexistence input usb husb_dp a8 i/o vdd_usb usb hub. if not used, connect to gnd. husb_dn a7 i/o vdd_usb if not used, connect to gnd. supplies vddif b1 i n/a radio if pll supply vddtf c1 i n/a radio pa supply vddlna e1 i n/a radio lna supply vddrf f1 i n/a radio supply vddpx g1 i n/a radio rf pll supply vddc a6 i n/a core logic supply vddc f8 i n/a core logic supply vddc ? i n/a core logic supply vddo g4 i n/a digital i/o supply voltage vddo a5 i n/a digital i/o supply voltage vddo e6 i n/a digital i/o supply voltage vdd_usb c8 i n/a usb transceiver supply voltage. if not used, connect to gnd. vss c2 ? n/a ground vss d2 ? n/a ground vss f2 ? n/a ground vss d3 ? n/a ground table 6: bcm20705 signal descriptions (cont.) signal wfbga pin (50-ball) i/o power domain description pin descriptions bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 42 vss c6 ? n/a ground vss ? ? n/a ground vss ? ? n/a ground table 6: bcm20705 signal descriptions (cont.) signal wfbga pin (50-ball) i/o power domain description ball grid arrays bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 43 section 8: ball grid arrays figure 9 shows the top view of the following array: ? 50-ball 4.5 x 4 x 0.8 mm (wfbga) figure 9: 4.5 x 4 x 0.8 mm (wfbga) array table 7: ball-out for the 50-ball wfbga 1 2 3 4 5 6 7 8 a vreg vreghv vbat rst_n vddo vddc husb_dn husb_dp b vddif reg_en gpio_1 lpo_in gpio_0 coex_in otp_dis cfg_sel c vddtf vss ? pcm_sync ? vss gpio_7 vdd_usb d rfp vss vss ? ? ? uart_rxd gpio_3 e vddlna ? tm2 gpio_6 uart_rts_ n vddo sda spim_clk f vddrf vss res gpio_5 pcm_out uart_txd scl vddc g vddpx xin xout vddo pcm_clk pcm_in uart_cts_ n spim_cs_n g f e d c b a 12345678 electrical characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 44 section 9: electrical characteristics note: all voltages listed in ta b l e 8 are referenced to v dd . table 8: absolute maximum voltages rating symbol minimum typical maximum unit dc supply voltage for rf vdd_rf a a. vdd_rf collectively refers to the vddif, vddlna, vddpx, and vddrf rf power supplies. ? 1.22 1.32 v dc supply voltage for core vddc ? 1.22 1.32 v dc supply voltage for i/o vddo b b. if vddo is not applied, voltage should never be applied to any digital i/o pins (i/o pins should never be driven or pulled high). the list of digital i/o pins includes the following (these pins are listed in section 7: ?pin-out and signal descriptions,? on page 40 with vddo shown as their power domain): gpio[3], gpio[5], gpio[6] scl, sda n_mode spim_cs_n, spim_clk ?1.83.6v dc supply vddtf ? 1.12 3.3 c c. vddtf for class 2 must be connected to vreg (main ldo output). vddtf for class 1 must be connected to vreghv (hv ldo output) or an external voltage source. refer to the broadcom compatibility guide for configuration details. v voltage on input or output pin vimax, vimin v ss ? 0.3 ? vddo + 0.3 v storage temperature range tstg ?40 ? 125 c electrical characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 45 table 9: power supply parameter symbol minimum typical maximum unit dc supply voltage for rf vdd_rf a a. vdd_rf collectively refers to the vddif, vddlna, vddpx, vddlna, vddrf rf power supplies. 1.159 1.22 1.281 v dc supply noise for rf, from 100 khz to 1mhz vdd_rf b b. overall performance defined using integrated regulation. ??150 v rms dc supply voltage for core vddc 1.159 1.22 1.281 v dc supply voltage for i/o vddo 1.7 ? 3.6 v dc supply voltage for usb vdd_usb 3.0 3.3 3.6 v dc supply vddtf c c. vddtf for class 2 must be connected to vreg (main ldo output). vddtf for class 1 must be connected to vreghv (hv ldo output) or an external voltage source. refer to the broadcom compatibility guide for configuration details. vddtf requires a capacitor to ground. the value of the capacitor must be tuned to ensure optimal rf rx sensitivity. typical 10 pf for bga packages and 6.2 pf for wafer package. the value may depend on board layout. 1.12 ? 3.0 d d. can be 3.3v if the output power is limited to 9 dbm. v table 10: high-voltage regulator (hv ldo) electrical specifications parameter minimum typical maximum unit input voltage 2.3 ? 5.5 v output voltage 1.8 ? 3.3 v max current load ? ? 95 ma load capacitance 1 ? 10 f load capacitor esr 0.01 ? 2 ? psrr 20 ? 40 db turn-on time (c load = 2.2 f) ? ? 200 s dropout voltage ? ? 200 mv table 11: main regulator (main ldo) electrical specifications parameter minimum typical maximum unit input voltage 1.63 ? 3.63 v output voltage 1.159 1.22 1.281 v load current ? ? 60 ma load capacitance 1 ? 2.2 f esr 0.1 ? 0.5 ? turn-on time ? ? 300 s psrr 15??db dropout voltage ? ? 200 mv electrical characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 46 table 12: digital i/o characteristics characteristics symbol minimum typical maximum unit input low voltage (vddo = 3.3v) v il ??0.8v input high voltage (vddo = 3.3v) v ih 2.0 ? ? v input low voltage (vddo = 1.8v) v il ??0.6v input high voltage (vddo = 1.8v) v ih 1.1 ? ? v output low voltage v ol ??0.4v output high voltage v oh vddo ? 0.4v ?? v input low current i il ??1.0 a input high current i ih ??1.0 a output low current (vddo = 3.3v, v ol = 0.4v) i ol ??3.0ma output high current (vddo = 3.3v, v oh = 2.9v) i oh ??3.0ma output low current (vddo = 1.8v, v ol = 0.4v) i ol ??3.0ma output high current (vddo = 1.8v, v oh = 1.4v) i oh ??3.0ma input capacitance c in ??0.4pf note: gpio_3/link_ind has a 10 ma ioh or iol driver current that can be used for an led. by default, the drive strength settings specified in ta b l e 1 2 are for 3.3v. to achieve the required drive strength for a vddo of 2.5v or 1.8v, contact a broadcom technical support representative (see ?technical support? on page 8 for contact information). table 13: pad i/o characteristics a pad name pull-up/pull-down fail-safe coex_in y y pcm_clk y y pcm_out y y pcm_in y y pcm_sync y y uart_rts_n y y uart_cts_n y y uart_rxd y y uart_txd y y gpio_0 y y gpio_1 y y gpio_4 y y gpio_7 y y rst_n n/a y usb d+ n/a y usb d- n/a y cfg_sel y n otp_dis y n electrical characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 47 a. all digital i/o internal pull-up or pull-down values are around 60 k ? . this does not include the usb signals. table 14: usb interface level parameter symbol minimum typical maximum unit i/o supply voltage vdd_usb 3.0 ? 3.6 v supply current icchpf ? ? 500 ma input high voltage (driven) vih 2.0 ? ? v input high voltage (floating) vihz 2.7 ? 3.6 v input low voltage vil ? ? 0.8 v differential input sensitivity vdi 0.2 ? ? v differential common-mode range vcm 0.8 ? 2.5 v output low voltage vol 0.0 ? 0.3 v output high voltage (driven) voh 2.8 ? 3.6 v output signal crossover voltage vcrs 1.3 ? 2.0 v electrical characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 48 table 15: current consumption?class 1(10 dbm) operational mode conditions typica l unit s receive (1 mbps) current level during receive of a basic rate packet 31 ma transmit (1 mbps) current level during transmit of a basic rate packet, gfsk output power = 10 dbm 65 ma receive (edr) current level during receive of a 2 or 3 mbps rate packet 32 ma transmit (edr) current level during transmit of a 2 or 3 mbps rate packet, gfsk output power = 10 dbm 59 ma dm1/dh1 average current during basic rate max throughput connection which includes only this packet type. 45 ma dm3/dh3 average current during basic rate max throughput connection which includes only this packet type. 46 ma dm5/dh5 average current during max basic rate throughput connection which includes only this packet type. 48 ma hv1 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 38 ma hv2 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 23 ma hv3 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 17 ma hci only active average current when waiting for hci command uart, usb, or spi transports. 4.8 ma sleep uart transport active, external lpo clock available. 55 a sleep, hv reg bypass uart transport active, external lpo clock available, hv ldo disabled and in bypass mode. 45 a inquiry scan (1.28 sec) periodic scan rate is 1.28 sec. 350 a page scan (r1) periodic scan rate is r1 (1.28 sec). 350 a inquiry scan + page scan (r1) both inquiry and page scans are interlaced together at 1.28 sec periodic scan rate. 630 a sniff master (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. 175 a sniff slave (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. sniff master follows optimal sniff protocol of bcm20705 master. 160 a sniff (500 ms) + inquiry/ page scan (r1) same conditions as sniff master and page scan (r1). scan maybe either inquiry scan or page scan at 1.28 sec periodic scan rate. 455 a sniff (500ms) + inquiry scan + page scan (r1) same conditions as sniff master and inquiry scan + page scan. 760 a electrical characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 49 table 16: current consumption?class 2 (3 dbm) operational mode conditions typical units receive (1 mbps) current level during receive of a basic rate packet 31 ma transmit (1 mbps) current level during transmit of a basic rate packet, gfsk output power = 3 dbm 44 ma receive (edr) current level during receive of a 2 or 3 mbps rate packet 32 ma transmit (edr) current level during transmit of a 2 or 3 mbps rate packet, gfsk output power = 3 dbm 41 ma dm1/dh1 average current during basic rate max throughput connection which includes only this packet type. 35 ma dm3/dh3 average current during basic rate max throughput connection which includes only this packet type. 36 ma dm5/dh5 average current during max basic rate throughput connection which includes only this packet type. 37 ma hv1 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 28 ma hv2 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 17 ma hv3 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 13 ma hci only active average current when waiting for hci command uart, usb, or spi transports. 4.8 ma sleep uart transport active, external lpo clock available. 55 a sleep, hv reg bypass uart transport active, external lpo clock available, hv ldo disabled and in bypass mode. 45 a inquiry scan (1.28 sec) periodic scan rate is 1.28 sec. 350 a page scan (r1) periodic scan rate is r1 (1.28 sec). 350 a inquiry scan + page scan (r1) both inquiry and page scans are interlaced together at 1.28 sec periodic scan rate. 630 a sniff master (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. 145 a sniff slave (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. sniff master follows optimal sniff protocol of bcm20705 master. 135 a sniff (500 ms) + inquiry/ page scan (r1) same conditions as sniff master and page scan (r1). scan maybe either inquiry scan or page scan at 1.28 sec periodic scan rate. 425 a sniff (500 ms) + inquiry scan + page scan (r1) same conditions as sniff master and inquiry scan + page scan. 730 a table 17: operating conditions parameter conditions minimum typical maximum unit temperature commercial ?30.0 ? 85 c power supply rf, core 1.14 1.22 1.32 v pa supply (vddtf) reduced power level 1.14 3.0 3.3 v rf specifications bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 50 rf specifications table 18: receiver rf specifications a, b parameter conditions minimum typical c maximum unit general frequency range ? 2402 ? 2480 mhz rx sensitivity d gfsk, 0.1% ber, 1 mbps ? ?89 ?85 dbm ? /4-dqpsk, 0.01% ber, 2 mbps ? ?91 ?85 dbm 8-dpsk, 0.01% ber, 3 mbps ? ?86 ?81 dbm maximum input gfsk, 1 mbps ? ? ?20 dbm maximum input ? /4-dqpsk, 8-dpsk, 2/ 3 mbps ???20dbm interference performance c/i cochannel gfsk, 0.1% ber ? ? 11 db c/i 1 mhz adjacent channel gfsk, 0.1% ber ? ? 0 db c/i 2 mhz adjacent channel gfsk, 0.1% ber ? ? ?30.0 db c/i > 3 mhz adjacent channel gfsk, 0.1% ber ? ? ?40.0 db c/i image channel gfsk, 0.1% ber ? ? ?9.0 db c/i 1 mhz adjacent to image channel gfsk, 0.1% ber ? ? ?20.0 db c/i cochannel ? /4-dqpsk, 0.1% ber ? ? 13 db c/i 1 mhz adjacent channel ? /4-dqpsk, 0.1% ber ? ? 0 db c/i 2 mhz adjacent channel ? /4-dqpsk, 0.1% ber ? ? ?30.0 db c/i > 3 mhz adjacent channel 8-dpsk, 0.1% ber ? ? ?40.0 db c/i image channel ? /4-dqpsk, 0.1% ber ? ? ?7.0 db c/i 1 mhz adjacent to image channel ? /4-dqpsk, 0.1% ber ? ? ?20.0 db c/i cochannel 8-dpsk, 0.1% ber ? ? 21 db c/i 1 mhz adjacent channel 8-dpsk, 0.1% ber ? ? 5 db c/i 2 mhz adjacent channel 8-dpsk, 0.1% ber ? ? ?25.0 db c/i > 3 mhz adjacent channel 8-dpsk, 0.1% ber ? ? ?33.0 db c/i image channel 8-dpsk, 0.1% ber ? ? 0 db c/i 1 mhz adjacent to image channel 8-dpsk, 0.1% ber ? ? ?13.0 db out-of-band blocking performance (cw) e 30 mhz?2000 mhz 0.1% ber ? ?10.0 ? dbm 2000?2399 mhz 0.1% ber ? ?27 ? dbm 2498?3000 mhz 0.1% ber ? ?27 ? dbm 3000 mhz?12.75 ghz 0.1% ber ? ?10.0 ? dbm rf specifications bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 51 out-of-band blocking performance, modulated interferer 776?764 mhz cdma ? ?15 ? dbm 824?849 mhz cdma ? ?15 ? dbm 1850?1910 mhz cdma ? ?20 ? dbm 824?849 mhz edge/gsm ? ?10 ? dbm 880?915 mhz edge/gsm ? ?10 ? dbm 1710?1785 mhz edge/gsm ? ?15 ? dbm 1850?1910 mhz edge/gsm ? ?15 ? dbm 1850?1910 mhz wcdma ? ?25 ? dbm 1920?1980 mhz wcdma ? ?25 ? dbm intermodulation performance f bt, df = 5 mhz ? ?39.0 ? ? dbm spurious emissions g 30 mhz to 1 ghz ? ? ? ?57 dbm 1 ghz to 12.75 ghz ? ? ? ?47 dbm 65 mhz to 108 mhz fm rx ? ?145 ? dbm/hz 746 mhz to 764 mhz cdma ? ?145 ? dbm/hz 851?894 mhz cdma ? ?145 ? dbm/hz 925?960 mhz edge/gsm ? ?145 ? dbm/hz 1805?1880 mhz edge/gsm ? ?145 ? dbm/hz 1930?1990 mhz pcs ? ?145 ? dbm/hz 2110?2170 mhz wcdma ? ?145 ? dbm/hz a. all specifications are single ended. unused inputs are left open. b. all specifications, except typical, are for industrial temperatures. for details see table 17 on page 49 . c. typical operating conditions are 1.22v operating voltage and 25c ambient temperature. d. the receiver sensitivity is measured at ber of 0.1% on the device interface. e. meets this specification using front-end band pass filter. f. f0 = -64 dbm bluetooth-modulated signal, f1 = ?39 dbm sine wave, f2 = ?39 dbm bluetooth-modulated signal, f0 = 2f1 ? f2, and |f2 ? f1| = n*1 mhz, where n is 3, 4, or 5. for the typical case, n = 5. g. includes baseband radiated emissions. table 18: receiver rf specifications a, b (cont.) parameter conditions minimum typical c maximum unit rf specifications bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 52 table 19: transmitter rf specifications a, b a. all specifications are for industrial temperatures. for details, see table 17 on page 49 . b. all specifications are single-ended. unused input are left open. parameter conditions minimum typical maximum unit general frequency range ? 2402 ? 2480 mhz class1: gfsk tx power c c. +10 dbm output for gfsk measured with vddtf = 2.9 v. ?6.510?dbm class1: edr tx power d d. +8 dbm output for edr measured with vddtf = 2.9 v. ?4.58?dbm class 2: gfsk tx power ? ?1.5 2 ? dbm power control step ? 2 4 6 db modulation accuracy ? /4-dqpsk frequency stability ? ?10 ? 10 khz ? /4-dqpsk rms devm ? ? ? 20 % ? /4-qpsk peak devm ? ? ? 35 % ? /4-dqpsk 99% devm ? ? ? 30 % 8-dpsk frequency stability ? ?10 ? 10 khz 8-dpsk rms devm ? ? ? 13 % 8-dpsk peak devm ? ? ? 25 % 8-dpsk 99% devm ? ? ? 20 % in-band spurious emissions +500 khz ? ? ? ?20 dbc 1.0 mhz < |m ? n| < 1.5 mhz ? ? ? ?26 dbc 1.5 mhz < |m ? n| < 2.5 mhz ? ? ? ?20 dbm |m ? n| > 2.5 mhz ? ? ? ?40 dbm out-of-band spurious emissions 30 mhz to 1 ghz ? ? ? ?36.0 e dbm 1 ghz to 12.75 ghz ? ? ? ?30.0 e, f dbm 1.8 ghz to 1.9 ghz ? ? ? ?47.0 dbm 5.15 ghz to 5.3 ghz ? ? ? ?47.0 dbm gps band noise emission (without a front-end band pass filter) 1572.92 mhz to 1577.92 mhz ? ? ?150 ?127 dbm/hz out-of-band noise emissions (without a front-end band pass filter) 65 mhz to 108 mhz fm rx ? ?145 ? dbm/hz 746 mhz to 764 mhz cdma ? ?145 ? dbm/hz 869 mhz to 960 mhz cdma ? ?145 ? dbm/hz 925 mhz to 960 mhz edge/gsm ? ?145 ? dbm/hz 1805 mhz to 1880 mhz edge/gsm ? ?145 ? dbm/hz 1930 mhz to 1990 mhz pcs ? ?145 ? dbm/hz 2110 mhz to 2170 mhz wcdma ? ?145 ? dbm/hz rf specifications bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 53 e. maximum value is the value required for bluetooth qualification. f. meets this spec using a front-end bandpass filter. timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 54 timing and ac characteristics in this section, use the numbers listed in the reference column to interpret the timing diagrams. startup timing there are two basic startup scenarios. in one scenario, the chip startup and firmware boot is held off while the rst_n pin is asserted. in the second scenario, the chip startup and firmware boot is directly triggered by the chip power-up. in this case, an internal power-on reset (por) is held for a few ms, after which the chip commences startup. the global reset signal in the bcm20705 is a logical or (actually a wired and, since the signals are active low) of the rst_n input and the internal por signals. the last signal to be released determines the time at which the chip is released from reset. the por is typically asserted for 3 ms after vddc crosses the 0.8v threshold, but it may be as soon as 1.5 ms after this event. after the chip is released from reset, both startup scenarios follow the same sequence, as follows: 1. for the bcm20705a1kwfbg parts: after approximately 120 s, the clk_req (gpio_5) signal is asserted (not available on bcm20705b0kwfbg parts). 2. the chip remains in sleep state for a minimum of 4.2 ms. 3. if present, the crystal (or tcxo) and lpo clocks must be oscillating by the end of the 4.2 ms period. if a tcxo clock is not in the system, a crystal is assumed to be present at the xin and xout pins. if an lpo clock is not used, the firmware will detect the absence of a clock at the lpo_in lead and use the internal lpo clock instead. the following two figures illustrate two startup timing scenarios. note: the gpio5 (clk_req) waveform does not apply to the bcm20705b0kwfbg. timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 55 figure 10: startup timing from power-on reset note: the gpio5 (clk_req) waveform does not apply to the bcm20705b0kwfbg. vddio, vbat,reg_en vddc > 0.8v t max = 4.2 ms gpio5 (clk_req) t min = 1.5 ms vreg xtal/tcxo lpo internal por t rampmax = 200 s t = 800 s t = 64 to 171 s timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 56 usb full-speed timing ta b l e 2 0 through ta b le 2 5 shows timing specifications for vdd_usb = 3.3v, v ss = 0v, and t a = 0 to 85 o c operating temperature range. figure 11: usb full-speed timing table 20: usb full-speed timing specifications reference characteristics minimum maximum unit 1 transition rise time 4 20 ns 2 transition fall time 4 20 ns 3 rise/fall timing matching 90 111 % 4 full-speed data rate 12 ? 0.25% 12 + 0.25% mb/s d+ d- v crs 90% 90% 10% 10% 1 2 timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 57 uart timing figure 12: uart timing table 21: uart timing specifications reference characteristics minimum maximum unit 1 delay time, uart_cts_n low to uart_txd valid ? 24 baudout cycles 2 setup time, uart_cts_n high before midpoint of stop bit ? 10 ns 3 delay time, midpoint of stop bit to uart_rts_n high ? 2 baudout cycles 1 3 2 uart_cts_n uart_txd uart_rxd uart_rts_n midpoint of stop bit midpoint of stop bit timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 58 pcm interface timing figure 13: pcm interface timing (short frame synchronization, master mode) table 22: pcm interface timing specifications (short frame synchronization, master mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency 128 2048 khz 2 pcm bit clock high time 128 ? ns 3 pcm bit clock low time 209 ? ns 4 delay from pcm_bclk rising edge to pcm_sync high ? 50 ns 5 delay from pcm_bclk rising edge to pcm_sync low ? 50 ns 6 delay from pcm_bclk rising edge to data valid on pcm_out ?50ns 7 setup time for pcm_in before pcm_bclk falling edge 50 ? ns 8 hold time for pcm_in after pcm_bclk falling edge 10 ? ns 9 delay from falling edge of pcm_bclk during last bit period to pcm_out becoming high impedance ?50ns 1 2 3 4 5 6 7 8 pcm_bclk pcm_sync pcm_out pcm_in bit 15 (previous frame) bit 15 (previous frame) bit 0 bit 0 bit 15 bit 15 9 high impedence timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 59 figure 14: pcm interface timing (short frame synchronization, slave mode) table 23: pcm interface timing specifications (short frame synchronization, slave mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency 128 2048 khz 2 pcm bit clock high time 209 ? ns 3 pcm bit clock low time 209 ? ns 4 setup time for pcm_sync before falling edge of pcm_bclk 50 ? ns 5 hold time for pcm_sync after falling edge of pcm_bclk 10 ? ns 6 hold time of pcm_out after pcm_bclk falling edge ? 175 ns 7 setup time for pcm_in before pcm_bclk falling edge 50 ? ns 8 hold time for pcm_in after pcm_bclk falling edge 10 ? ns 9 delay from falling edge of pcm_bclk during last bit period to pcm_out becoming high impedance ?100ns 1 2 3 4 5 6 7 8 pcm_bclk pcm_sync pcm_out pcm_in bit 0 bit 0 bit 15 bit 15 bit 15 (previous frame) bit 15 (previous frame) high impedence 9 timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 60 figure 15: pcm interface timing (long frame synchronization, master mode) table 24: pcm interface timing specifications (long frame synchronization, master mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency 128 2048 khz 2 pcm bit clock high time 209 ? ns 3 pcm bit clock low time 209 ? ns 4 delay from pcm_bclk rising edge to pcm_sync high during first bit time ?50ns 5 delay from pcm_bclk rising edge to pcm_sync low during third bit time ?50ns 6 delay from pcm_bclk rising edge to data valid on pcm_out ?50ns 7 setup time for pcm_in before pcm_bclk falling edge 50 ? ns 8 hold time for pcm_in after pcm_bclk falling edge 10 ? ns 9 delay from falling edge of pcm_bclk during last bit period to pcm_out becoming high impedance ?50ns 1 2 3 4 5 6 7 8 pcm_bclk pcm_sync pcm_out pcm_in bit 0 bit 0 bit 1 bit 1 bit 2 bit 2 bit 15 bit 15 high impedence 9 timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 61 figure 16: pcm interface timing (long frame synchronization, slave mode) table 25: pcm interface timing specificati ons (long frame synchronization, slave mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency. 128 2048 khz 2 pcm bit clock high time. 209 ? ns 3 pcm bit clock low time. 209 ? ns 4 setup time for pcm_sync before falling edge of pcm_bclk during first bit time. 50 ? ns 5 hold time for pcm_sync after falling edge of pcm_bclk during second bit period. (pcm_sync may go low any time from second bit period to last bit period). 10 ? ns 6 delay from rising edge of pcm_bclk or pcm_sync (whichever is later) to data valid for first bit on pcm_out. ?50ns 7 hold time of pcm_out after pcm_bclk falling edge. ? 175 ns 8 setup time for pcm_in before pcm_bclk falling edge. 50 ? ns 9 hold time for pcm_in after pcm_bclk falling edge. 10 ? ns 10 delay from falling edge of pcm_bclk or pcm_sync (whichever is later) during last bit in slot to pcm_out becoming high impedance. ?100ns 1 2 3 45 7 8 9 pcm_bclk pcm_sync pcm_out pcm_in bit 0 bit 1 bit 0 bit 1 bit 15 bit 15 6 high impedence 10 timing and ac characteristics bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 62 bsc interface timing figure 17: bsc interface timing diagram table 26: bsc interface timing specifications reference characteristics minimum maximum unit 1 clock frequency ? 100 400 800 1000 khz 2 start condition setup time 650 ? ns 3 start condition hold time 280 ? ns 4 clock low time 650 ? ns 5 clock high time 280 ? ns 6 data input hold time a a. as a transmitter, 300 ns of delay is provided to bridge the undefined region of the falling edge of scl to avoid unintended generation of start or stop conditions 0?ns 7 data input setup time 100 ? ns 8 stop condition setup time 280 ? ns 9 output valid from clock ? 400 ns 10 bus free time b b. time that the cbus must be free before a new transaction can start. 650 ? ns 2 3 4 5 6 78 9 10 scl sda in sda out 1 mechanical information bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 63 section 10: mechanical information figure 18: 50-ball wfbga mechanical drawing tape, reel, and packing specification bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 64 tape, reel, and p acking specification figure 19: reel, labeling, and packing specification ? ? ? ? b r o a d c o m b a r c o d e esd warning device orientation/mix lot number each reel may contain up to three lot numbers, independent of the date code. individual lots must be labeled on the box, moisture barrier bag, and the reel. moisture barrier bag contents/label desiccant pouch (minimum 1) humidity indicator (minimum 1) reel (maximum 1) pin 1 top-right corner toward sprocket holes. ordering information bcm20705 data sheet broadcom confidential broadcom ? bluetooth transceiver and baseband processor november 13, 2014 ? mcs20705-ds104-r page 65 section 11: ordering information the following table lists available part numbers and describes differences in package type, available i/o, and functional configuration. see the referenced figures and tables for mechanical drawings and package i/o information. all packages are rated from ?30c to +85c. part number package type functional i/o features strapped configuration bcm20705a1kwfbg commercial 50-ball wfbga, 4.5 mm x 4.0 mm x 0.8 mm. see figure 18 on page 63 ?? bcm20705b0kwfbg commercial 50-ball wfbga, 4.5 mm x 4.0 mm x 0.8 mm. see figure 18 on page 63 ?? phone: 949-926-5000 fax: 949-926-5203 e-mail: info@broadcom.com web: www.broadcom.com broadcom corporation 5300 california avenue irvine, ca 92617 ? 2014 by broadcom corporation. all rights reserved. mcs20705-ds104-r november 13, 2014 broadcom ? corporation reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. information furnished by broadcom corporation is believed to be accurate and reliable. however, broadcom corporation does not assume any liability arising out of the application or use of this information, nor the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. bcm2070 data sheet ? |
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