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FEDL9476-01 issue date: oct. 1, 2010 ml9476 1/3 or 1/4 duty, 16-output lcd driver 1/20 general description the ml9476 is an lcd driver for dynamic display. it has a function to switch between 1/3 and 1/4 duty. when 1/4 duty is selected, an lcd of up to 64 segments can be driven directly; when 1/3 duty is selected, an lcd of up to 48 segments can be driven directly. features ? logic power supply voltage : 2.7 to 3.6 v, 4.5 to 5.5 v ? driver power supply voltage : 3.5 to 5.5 v ? operating temperature : ? 40 to +105c ? 16 segment outputs 1/4 duty : up to 64 segments can be displayed. 1/3 duty : up to 48 segments can be displayed. ? serially interfaces with the cpu using the three signal lines of load, data_in, and clock ? built-in rc oscillator circuit for lcd ac drive (the clksel pin allows selecting an external clock input) ? built-in voltage-dividing resistor for bias voltage generation ? package : 48-pin plastic tqfp (tqfp48-p-0707-0.50-k)
FEDL9476-01 ml9476 2/20 block diagram 16-dot segment driver 16-bit latch4 latch selector load osc latch3 latch1 latch2 data_in clock 3/4sel dvdd vss timing generator 16-ch data selector common driver seg1 seg16 com1 16 22(16 + 6)-bit shift register 16-bit 16-bit 16-bit 16 16 16 com2 com3 com4 lvdd clksel bias res.. 16 test osc rese t
FEDL9476-01 ml9476 3/20 pin configuration (top view) 48-pin plastic tqfp n.c : no-connection pin com3 com4 clksel vss osc lvdd 3/4sel test rese t n.c data_in clock com2 load com1 n.c seg1 n.c seg2 n.c seg3 n.c seg4 n.c seg5 n.c seg6 n.c seg7 n.c seg8 n.c seg9 n.c seg10 n.c seg15 seg16 dvdd n.c seg11 seg12 seg13 seg14 21 22 23 24 13 14 15 16 17 18 19 20 n.c n.c n.c n.c 11 26 12 25 9 28 10 27 7 30 8 29 5 32 6 31 3 34 4 33 1 36 2 35 38 37 42 41 40 39 46 45 44 43 48 47
FEDL9476-01 ml9476 4/20 pin description symbol i/o description osc i/o pin for oscillation. has a schmitt circuit built in. an oscillator circuit can be configured by connecting one external resistor and one external capacitor. since an oscillator circuit is susceptible to external noise, make the wiring between this pin and external components as short as possible. an external clock input can be selected by clksel. the relationship between oscillation frequency f osc and frame frequency f frm is: f frm = f osc /24 (*1) data_in i serial data input pin. has a schmitt circuit built in. the lcd display is turned on when the input data signal is at a ?h? level and turned off when the input data signal is at a ?l? level. clock i shift clock input pin. has a schmitt circuit built in. data to the data_in pin is shifted in sync with the rising edges of the shift clock pulses. load i load pulse input pin. has a schmitt circuit built in. used to transfer serially input data to the display latch or write commands. test i ic test pin. has a pull-down resistor built in. leave this pin open or connect it to vss when not used. clksel i osc pin input switching pin. when using the built-in oscillator circuit, set this pin to a ?l? level; when inputting an external clock, set this pin to a ?h? level. while this pin is at a ?h? level, the oscillator circuit connected is disabled. 3/4sel i 1/3- or 1/4-duty switching input pin. when ?h? level is input, 1/3 duty is selected and when ?l? level is input, 1/4 duty is selected. reset i reset signal input pin for initializing the ic. has a schmitt circuit built in. this pin is enabled by setting it to ?l? level. this pin has a built-in pull-up resistor. normally, this pin, when connected with an external capacitor, performs power-on reset. (*2) com1 com2 com3 com4 o output pins for lcd display. connect to the common pins of the lcd panel. - when 1/3 duty is selected: common signals are outputted through the com1, com2, and com3 pins. leave the com4 pin open. - when 1/4 duty is selected: common signals are outputted through the com1, com2, com3, and com4 pins. seg1 to seg16 o output pins for lcd display. connect to the segment pins of the lcd panel. for the relationship between each output of these pins and data, see the section on ?data structure.? lvdd logic power supply pin. dvdd lcd driver power supply pin. vss ground pin. n.c no-connection pin. normally leave this pin open.
FEDL9476-01 ml9476 5/20 *1: oscillator circuit configuration *2: reset circuit configuration c o osc r o lvdd r eset lvdd c rst
FEDL9476-01 ml9476 6/20 absolute maximum ratings parameter symbol condition rating unit power supply voltage lvdd, dvdd ta = 25c ?0.3 to +6.5 v input voltage v i ta = 25c ?0.3 to lvdd+0.3 v power dissipation p d ta ? 105c 350 mw output current i o ta = 25c ?2.0 to +2.0 ma storage temperature t stg ? ?55 to +150 c recommended operating conditions parameter symbol condition range unit logic power supply volta g e lvdd vss= 0 v 2.7 to 3.6, 4.5 to 5.5 v lcd drive voltage dvdd vss= 0 v 3.5 to 5.5 v clock frequency fcp ? 0.01 to 2 mhz operating temperature t a ? ?40 to +105 c recommended setting range for external parts (for oscillator circuit) (lvdd = 4.5 to 5.5 v) parameter symbol condition min. max. unit oscillator resistor r o ? 20 82 k ? oscillator capacitor c o ? 0.01 0.047 ? f frame frequency f frm ? 14.6 451.0 hz the relationship between external oscillator resistor value, external oscillator capacitor value, and frame frequency is as follows: ffrm = f osc / 24 f osc = 1 / (device coefficient ? external oscillator resistor value r o ? external oscillator capacitor value c o ) device coefficient = 0.6 ? 23% (lvdd = 2.7 to 3.6 v) parameter symbol condition min. max. unit oscillator resistor r o ? 20 82 k ? oscillator capacitor c o ? 0.01 0.047 ? f frame frequency f frm ? 14.6 451.0 hz the relationship between external oscillator resistor value, external oscillator capacitor value, and frame frequency is as follows: ffrm = f osc / 24 f osc = 1 / (device coefficient ? external oscillator resistor value r o ? external oscillator capacitor value c o ) device coefficient = 0.6 ? 23%
FEDL9476-01 ml9476 7/20 electrical characteristics dc characteristics (lvdd = 2.7 to 3.6 v, 4.5 to 5.5 v, dvdd = 3.5 to 5.5, ta = ?40 to +105c) parameter symbol condition min. max. unit applicable pin lvdd = 4.5 to 5.5v 0.8lvdd v ih lvdd = 2.7 to 3.6v 0.85lvdd *1 lvdd = 4.5 to 5.5v clksel = ?h? 0.8lvdd ?h? input voltage v ihosc lvdd = 2.7 to 3.6v clksel = ?h? 0.85lvdd lvdd v osc lvdd = 4.5 to 5.5v 0.2lvdd v il lvdd = 2.7 to 3.6v 0.15lvdd *1 lvdd = 4.5 to 5.5v clksel = ?h? 0.2lvdd ?l? input voltage v ilosc lvdd = 2.7 to 3.6v clksel = ?h? 0 0.15lvdd v osc i ih1 v i = lvdd ? 1 ? a *2 ?h? input current i ihosc v i = lvdd clksel = ?h? ? 1 ? a osc i il1 v i = 0v ?1 ? ? a *2 lvdd = 5v v i = 0v ?0.009 ?0.045 ma i il2 lvdd = 3v v i = 0v ?0.004 ?0.030 ma reset ?l? input current i ilosc v i = 0v clksel = ?h? ?1 ? ? a osc v os0 dvdd = 4.5v i o = ?10 ? a dvdd ? 0.8 ? v v os1 dvdd = 4.5v i o = ? 10? a 2/3dvdd ? 0.8 2/3dvdd + 0.8 v v os2 dvdd = 4.5v i o = ? 10? a 1/3dvdd ? 0.8 1/3dvdd + 0.8 v segment output voltage v os3 dvdd = 4.5v i o = 10 ? a ? 0.8 v seg1 to seg16 v oc0 dvdd = 4.5v i o = ?10 ? a dvdd ? 0.77 ? v v oc1 dvdd = 4.5v i o = ? 10? a 2/3dvdd ? 0.77 2/3dvdd+0.77 v v oc2 dvdd = 4.5v i o = ? 10? a 1/3dvdd ? 0.77 1/3dvdd+0.77 v common output voltage v oc3 dvdd = 4.5v i o = 10 ? a ? 0.77 v com1 to com4 dynamic supply current i dvdd+ i l vdd *3 ? 0.5 ma lvdd, dvdd *1 clock, load, data_in, reset , 3/4sel, and clksel *2 clock, load, data_in, 3/4sel, and clksel *3 c o = 0.022 ? f, r o = 33 k ? , no load
FEDL9476-01 ml9476 8/20 switching characteristic s (serial i nterface) (lvdd = 2.7 to 3.6 v, 4.5 to 5.5 v, dvdd = 3.5 to 5.5 v, ta = ? 40 to +105c) parameter symbol condition min. max. unit clock frequency f cp ? 0.01 2.0 mhz clock pulse width t wcp ? 70 ? ns rise time, fall time *4 t r , t f ? ? 3 ? s data setup time t dsu ? 50 ? ns data hold time t dhd ? 50 ? ns load pulse width t wld ? 100 ? ns clock to load time t cl ? 100 ? ns load to clock time t lc ? 100 ? ns *4 applied to clock pin clock data_in load t r t wcp t wcp tf vih vil 1/f cp vih vil t lc t wld t cl vih vil vih vil t dsu t dhd
FEDL9476-01 ml9476 9/20 switching characteristics (external clock input to osc) (lvdd = 2.7 to 3.6 v, 4.5 to 5.5 v, dvdd = 3.5 to 5.5 v, ta = ? 40 to +105c) parameter symbol condition min. max. unit osc input frequency f osc clksel = ?h? 0.5 10 khz osc rise time, fall time *5 t rosc, t fosc clksel = ?h? ? 1 ? s osc ?h? period t whosc clksel = ?h? 4 ? ? s osc ?l? period t wlosc clksel = ?h? 4 ? ? s *5 applied to osc pin 1/f osc t rosc t whosc t fosc t wlosc osc v ihosc v ilosc v ilosc v ilosc v ihosc
FEDL9476-01 ml9476 10/20 power-on/off timing if lvdd is in the range of 0 v to lvddmin, make sure that lvdd ? dvdd and t ? 0[ns] are satisfied. when performing power-on reset with a capacitor connected to the reset pin, be careful about the relationship between the capacitance value and the rise time of the power supply. initialization timing drive the reset pin low and hold it low under the condition ?t1 ? 0[ns]? until lvdd reaches lvddmin. the value of the current of the pull-up resistor is specified for reset pin. the customer needs to select an external capacitor that meets the timing requirements shown above. lvdd dvdd time voltage t t lvdd reset vil t1 lvddmin
FEDL9476-01 ml9476 11/20 functional description description of operation ? disp lay data input as described in the section on ?data structure,? display data consists of a data field, which corresponds to the lcd segments on and off, and a command field, which indicates the input of display data. set a value in each of bits c0 and c1 in the command fi eld according to the common output that corresponds to the display data, and set a display data input command in the remaining four bits. data that has been input to the data_in pin is loaded into the shift register on the rising edges of the clock pulses, transferrred to the display data latch during the ?h? level period of the load pulse, and then output via the segment driver. d1 d2 d3 d4 d14 d15 d16 c0 c1 c2 c3 c4 clock data_in old data new data load displa y output c5
FEDL9476-01 ml9476 12/20 ? display on, display off display goes off when power-on reset is executed; therefore, to turn display on, write the display on command (f5). the display off command (f4) is a command that makes all segments go off. by writing the display off command, the segments go off irrespective of display data. the display on command (f5) is a command that clears a display off state. by writing the display on command, display goes back to the previous state. d1 d2 c4 c2 c3 c4 c5 c2 c3 c4 c5 clock data_in load display on/off c5 r eset input of display data write display on command write display off command
FEDL9476-01 ml9476 13/20 list of commands command name c5 c4 c3 c2 c1 c0 description f0 0 0 0 ? ? ? disabled f0? 0 0 0 1 ? ? disabled 0 display data input (corresponds to com1) 0 1 display data input (corresponds to com2) 0 display data input (corresponds to com3) f1 0 0 1 0 1 1 display data input (corresponds to com4) f2 0 1 0 ? ? ? disabled 0 disabled 0 1 disabled 0 disabled f3 0 1 1 0 1 1 disabled f3? 0 1 1 1 ?? ?? disabled f4 1 0 1 0 ? ? display off f5 1 0 1 1 ? ? display on f6 1 1 0 ? ? ? disabled f7 1 0 0 ? ? ? disabled f8 1 1 1 ? ? ? disabled ? : don't care if a ?disabled? command is executed, no transfer is carried out from the shift register to the latch; however, data within the shift register will be rewritten. to transfer correct data to the latch, it is necessary to transfer data again using the f1 command.
FEDL9476-01 ml9476 14/20 data structure [in pu t data] d14 d15 d16 d3 d2 d1 c0 c1 c2 c3 c4 c5 command lcd display data corresponds to seg1 corresponds to seg16 fir st bit note 1: the setting of command f4 or f5 becomes enabled by inputting only the four bits of c2 to c5. (no need to input d1 to d16, c0, or c1.) note 2: if any dummy bits are required because of th e transfer bit count, add them before the first bit. note 3: command execution depends on the value of bits c5 to c0 stored immediately before load goes to a ?h? level.
FEDL9476-01 ml9476 15/20 common and segment output waveforms ? 1/ 3 du ty dvdd v1 v2 vss com1 com2 com3 dvdd v1 v2 vss dvdd v1 v2 vss dvdd v1 v2 vss dvdd v1 v2 vss seg1 seg2 s e g 1 s e g 2 com1 com2 com3 display
FEDL9476-01 ml9476 16/20 ? 1/4 duty s e g 1 s e g 2 com1 com2 com3 display com4 dvdd v1 v2 vss com1 com2 com3 dvdd v1 v2 vss dvdd v1 v2 vss dvdd v1 v2 vss dvdd v1 v2 vss com4 seg1 dvdd v1 v2 vss seg2
FEDL9476-01 ml9476 17/20 application circuit com3 com4 com4 com3 lvdd load data_in clock clksel seg1 seg16 ml9476 +5 v osc vss test r ese t seg1 seg16 1/4 duty lcd cpu com1 com2 com2 com1 3/4sel +5 v dvdd
FEDL9476-01 ml9476 18/20 package dimensions notes for mounting the surface mount type package the surface mount type packages are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact rohm's responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). ( unit: mm )
FEDL9476-01 ml9476 19/20 revision history page document no. date previous edition current edition description FEDL9476-01 oct. 1, 2010 ? ? final edition 1
FEDL9476-01 ml9476 20/20 notice no copying or reproduction of this document, in part or in whole, is permitted without the consent of lapis semiconductor co., ltd. the content specified herein is subject to change for improvement without notice. the content specified herein is for the purpose of introducing lapis semiconductor's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from lapis semiconductor upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, lapis semiconductor shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the products. lapis semiconductor does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by lapis semiconductor and other parties. lapis semiconductor shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while lapis semiconductor always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redundancy, fire control and fail-safe designs. lapis semiconductor shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (suc h as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fu el-controller or other safety device). lapis semiconductor shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law. copyright 2010 - 2011 lapis semiconductor co., ltd.

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