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KS0794 160 com / 160 seg driver for stn lcd august.199 9 . ver. 1.1 prepared by : gyeong -nam, kim k gn@samsung.co.kr contents in this document are subject to change without notice. no part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of lcd driver ic team.
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 2 KS0794 specification revision history version content date 0.0 l original apr.1999 1.0 l including application note. jul.1999 1.1 l p6, p16 revision. aug.1999
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 3 contents introduction ................................ ................................ ................................ ................................ .................. 4 features ................................ ................................ ................................ ................................ .......................... 4 block diagram ................................ ................................ ................................ ................................ ............... 5 pad configuration ................................ ................................ ................................ ................................ ....... 6 pad center coordinates ................................ ................................ ................................ ............................ 7 pin description ................................ ................................ ................................ ................................ .............. 9 functional description ................................ ................................ ................................ ............................ 10 block function ................................ ................................ ................................ ................................ ..... 10 pin function ................................ ................................ ................................ ................................ ........... 11 functional operations ................................ ................................ ................................ ...................... 15 specifications ................................ ................................ ................................ ................................ .............. 18 absolute maximum ratings ................................ ................................ ................................ ............... 18 recommended operating conditions ................................ ................................ ........................... 18 dc characteristics ................................ ................................ ................................ ............................. 19 ac characteristics ................................ ................................ ................................ ............................. 21 precaution ................................ ................................ ................................ ................................ .................... 27 connection examples of plural segment drivers ................................ ................................ ........ 28 timing chart of 4-device casecade connection of segment drivers ................................ ...... 29 connection examples of plural common drivers ................................ ................................ ......... 30
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 4 i ntroduction the KS0794 is a 160-output segment / common driver lsi suitable for driving large scale dot matrix lc panels using as personal computers / work stations. through the use of sst (super slim tcp) technology, it is ideal for substantially decreasing the size of the frame section of the lc mod u le. the KS0794 is good both segment driver and common driver, and a low power consuming, high-precision lc panel display can be assembled. in case of segment mode, the data input is selected 4bit parallel input mode and 8bit parallel input mode by a mode (md) pin. in case of common mode, data input/output pins are bi-directional , four data shift directions are pin-selectable . features both segment mode and common mode - supply voltage for lc driver: +15.0 to +32.0v - number of lc driver outputs: 160 - low output impedance - low power consumption - supply voltage for the logic system: +2.4v to +5.5v - cmos silicon gate process (p-type si licon s ubstrate) - package: 190-pin tcp (tape carrier package) & au bump chip segment m ode - shift clock frequency: 14mhz (max . ) ( vdd = +5v 10%) 8mhz (max . ) ( vdd = +2.4v to +4.5v) - adopts a data bus system - 4-bit / 8-bit parallel input modes are selectable with a mode (md) pin - automatic transfer function of an enable signal - automatic counting function which, in the chip select, causes the internal clock to be stopped by automatically counting 160 of input data - line latch circuit reset function when dispoffb active common m ode - shift clock frequency: 4.0mhz (max . ) ( v dd = +2.4v to +5.5v) - built-in 160 bits bi-directional shift register (divisible into 80-bits 2) - available in a single mode (160 bits shift register) or in a dual mode (80 bits shift register 2) - shift register circuit reset function when dispoffb active
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 5 block diagram level shifter 160 bits 4-level driver 160 bits level shifter 160 bits line latch/shifter register data latch control sp conversion & data control (4 to 8 or 8to 8) active control 182 179 181 169 control logic 180 178 166 183 168 190 189 188 164 1 2 160 159 187 163 162 161 170 171 172 173 174 175 176 177 165 186 167 8bits*2 data latch fr dispoffb eio1 eio2 lp xck l/r md s/c d i 0 d i 1 d i 2 d i 3 di 4 di 5 di 6 di 7 v dd v ss v ss v 5l v 43l v 12l v ol y 160 y 159 y 1 y 2 v or v 12r v 43r v 5l 160 160 16 16 16 16 16 16 16 16 8 16 16 figure 1 . block diagram
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 6 pad configuration eeeeeeeeeeeeeeeeeeeee - - - - - - - - - - eeeeeeeeeeeeeeeeeeee y 1 160 190 161 187 164 KS0794 (top view ,pad up) (0,0) x e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e 186 dummy dummy 165 figure 2 . KS0794 chip configuration table 1 . KS0794 pad dimensions size item pad no. x y unit chip size - 11000 1100 1 to 160 65 (m in.) pad pitch 161 to 190 260 (m in. ) 1 to 160 43 108 161 to 164 187 to 190 76 58 bumped pad size 165 to 186 58 76 bumped pad height 1 to 190 14 ( typ . ) m m
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 7 pad center coordinates table 2 . pad location [unit: m m] no name x y no name x y no name x y 1 y1 5167.5 395 51 y51 1917.5 395 101 y101 -1332.5 395 2 y2 5102.5 395 52 y52 1852.5 395 102 y102 -1397.5 395 3 y3 5037.5 395 53 y53 1787.5 395 103 y103 -1462.5 395 4 y4 4972.5 395 54 y54 1722.5 395 104 y104 -1527.5 395 5 y5 4907.5 395 55 y55 1657.5 395 105 y105 -1592.5 395 6 y6 4842.5 395 56 y56 1592.5 395 106 y106 -1657.5 395 7 y7 4777.5 395 57 y57 1527.5 395 107 y107 -1722.5 395 8 y8 4712.5 395 58 y58 1462.5 395 108 y108 -1787.5 395 9 y9 4647.5 395 59 y59 1397.5 395 109 y109 -1852.5 395 10 y10 4582.5 395 60 y60 1332.5 395 110 y110 -1917.5 395 11 y11 4517.5 395 61 y61 1267.5 395 111 y111 -1982.5 395 12 y12 4452.5 395 62 y62 1202.5 395 112 y112 -2047.5 395 13 y13 4387.5 395 63 y63 1137.5 395 113 y113 -2112.5 395 14 y14 4322.5 395 64 y64 1072.5 395 114 y114 -2177.5 395 15 y15 4257.5 395 65 y65 1007.5 395 115 y115 -2242.5 395 16 y16 4192.5 395 66 y66 942.5 395 116 y116 -2307.5 395 17 y17 4127.5 395 67 y67 877.5 395 117 y117 -2372.5 395 18 y18 4062.5 395 68 y68 812.5 395 118 y118 -2437.5 395 19 y19 3997.5 395 69 y69 747.5 395 119 y119 -2502.5 395 20 y20 3932.5 395 70 y70 682.5 395 120 y120 -2567.5 395 21 y21 3867.5 395 71 y71 617.5 395 121 y121 -2632.5 395 22 y22 3802.5 395 72 y72 552.5 395 122 y122 -2697.5 395 23 y23 3737.5 395 73 y73 487.5 395 123 y123 -2762.5 395 24 y24 3672.5 395 74 y74 422.5 395 124 y124 -2827.5 395 25 y25 3607.5 395 75 y75 357.5 395 125 y125 -2892.5 395 26 y26 3542.5 395 76 y76 292.5 395 126 y126 -2957.5 395 27 y27 3477.5 395 77 y77 227.5 395 127 y127 -3022.5 395 28 y28 3412.5 395 78 y78 162.5 395 128 y128 -3087.5 395 29 y29 3347.5 395 79 y79 97.5 395 129 y129 -3152.5 395 30 y30 3282.5 395 80 y80 32.5 395 130 y130 -3217.5 395 31 y31 3217.5 395 81 y81 -32.5 395 131 y131 -3282.5 395 32 y32 3152.5 395 82 y82 -97.5 395 132 y132 -3347.5 395 33 y33 3087.5 395 83 y83 -162.5 395 133 y133 -3412.5 395 34 y34 3022.5 395 84 y84 -227.5 395 134 y134 -3477.5 395 35 y35 2957.5 395 85 y85 -292.5 395 135 y135 -3542.5 395 36 y36 2892.5 395 86 y86 -357.5 395 136 y136 -3607.5 395 37 y37 2827.5 395 87 y87 -422.5 395 137 y137 -3672.5 395 38 y38 2762.5 395 88 y88 -487.5 395 138 y138 -3737.5 395 39 y39 2697.5 395 89 y89 -552.5 395 139 y139 -3802.5 395 40 y40 2632.5 395 90 y90 -617.5 395 140 y140 -3867.5 395 41 y41 2567.5 395 91 y91 -682.5 395 141 y141 -3932.5 395 42 y42 2502.5 395 92 y92 -747.5 395 142 y142 -3997.5 395 43 y43 2437.5 395 93 y93 -812.5 395 143 y143 -4062.5 395 44 y44 2372.5 395 94 y94 -877.5 395 144 y144 -4127.5 395 45 y45 2307.5 395 95 y95 -942.5 395 145 y145 -4192.5 395 46 y46 2242.5 395 96 y96 -1007.5 395 146 y146 -4257.5 395 47 y47 2177.5 395 97 y97 -1072.5 395 147 y147 -4322.5 395 48 y48 2112.5 395 98 y98 -1137.5 395 148 y148 -4387.5 395 49 y49 2047.5 395 99 y99 -1202.5 395 149 y149 -4452.5 395 50 y50 1982.5 395 100 y100 -1267.5 395 150 y150 -4517.5 395
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 8 table 2 . pad location ( continued ) [unit: m m] no name x y 151 y151 -4582.5 395 152 y152 -4647.5 395 153 y153 -4712.5 395 154 y154 -4777.5 395 155 y155 -4842.5 395 156 y156 -4907.5 395 157 y157 -4972.5 395 158 y158 -5037.5 395 159 y159 -5102.5 395 160 y160 -5167.5 395 161 vol -5369 330 162 v12l -5369 90 163 v43l -5369 -120 164 v5l -5369 -330 dummy1 -4860 -419 165 vss -4600 -419 166 lr -4340 -419 167 vdd -4080 -419 168 sc -3820 -419 169 eio2 -3560 -419 170 di0 -3300 -419 171 di1 -3040 -419 172 di2 -2780 -419 173 di3 -2520 -419 174 di4 -2260 -419 175 di5 -2000 -419 176 di6 -1740 -419 177 di7 -1480 -419 178 xck 2290 -419 179 dispoffb 2550 -419 180 lp 2810 -419 181 eio1 3070 -419 182 fr 3330 -419 183 md 3590 -419 184 nc 3850 -419 185 nc 4110 -419 186 vss 4370 -419 dummy2 4630 -419 187 v5r 5369 -330 188 v43r 5369 -120 189 v12r 5369 90 190 v0r 5369 330
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 9 pin description table 3 . pin description pin no. symbol i/o description 1 to 160 y 1 ? y 160 o lc driver output 161, 190 v 0l , v 0r - power supply for lc driver 162, 189 v 12l , v 12r - power supply for lc driver 163, 188 v 43l , v 43r - power supply for lc driver 164, 187 v 5l , v 5r - power supply for lc driver 166 l/r i display data shift direction selection 167 v dd - power supply for logic system (+2.4 to +5.5v) 168 s/c i segment mode/common mode selection 169 eio 2 i/o input / output for chip select or data of shift register 170 to 176 di 0 ? di 6 i display data input for segment mode 177 di 7 i display data input for segment mode / d ual mode data input 178 xck i display data shift clock input for segment mode 179 dispoffb i control input for deselect output level 180 lp i latch pulse input / shift clock input for shift register 181 eio 1 i/o input/output for chip select or data of shift register 182 fr i ac-converting signal input for lc driver waveform 183 md i mode selection input 165, 186 v ss - ground (0v)
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 10 functional description block function . active c ontrol in case of segment mode, controls the selection or deselection of the chip. following a lp signal, and after the chip select signal is input, a select signal is generated internally until 160 bits of data have been read in. once data input has been completed, a select signal for cascade connection is output, and the chip is deselected. in case of common mode, controls the input/output data of bidirectional pins. . sp c onversion & data c ontrol in case of segment mode, keep input data which are 2 clocks of xck at 4-bit parallel mode into latch circuit, or keep input data which are 1 clock of xck at 8-bits parallel mode into latch circuit, after that they are put on the internal data bus 8 bits at a time. . data l atch c ontrol in case of segment mode, selects the state of the data latch which reads in the data bus signals. the shift direction is controlled by the control logic, for every 16 bits of data read in, the selection signal shifts one bit based on the state of the control circuit. . data l atch in case of segment mode, latches the data on the data bus. the latched state of each lc driver output pin is controlled by the control logic and the data latch control, 160 bits of data are read in 20 sets of 8 bits. . line l atch / shift r egister in case of segment mode, all 160 bits which have been read into the data latch are simultaneously latched on the falling edge of the lp signal, and output to the level shifter block. in case of common mode, shifts data from the data input pin on the falling edge of the lp signal. . level s hifter the logic voltage signal is level-shifted to the lc driver voltage level, and output to the driver block. . 4- l evel dr iver driver the lc driver output pins from the line latch/shift register data, selecting one of 4 levels (v 0 , v 12 , v 43 , v 5 ) based on the s/c, fr and dispoffb signals. . control l ogic controls the operation of each block. in case of segment mode, when a lp signal has been input, all blocks are reset and the control logic waits for the selection signal output from the active control block. once the selection signal has been output, operation of the data latch and data transmission are controlled, 160 bits of data are read in, and the chip is deselected. in case of common mode, controls the direction of data shift.
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 11 pin function segment m ode symbol function v dd logic system power supply pin connects to +2.4 to +5.5v v ss ground pin connects to 0 v v 0r , v 0l v 12r , v 12l v 43r , v 43l power supply pin for lc driver voltage bias. . normally, the bias voltage used is set by a resistor divider. . ensure that voltage are set such that v ss 160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 12 segment m ode (continued) fr ac signal input for lc driving waveform . the input signal is level-shifted from logic voltage level to lc drive voltage level, and controls lc drive circuit. . normally, inputs a frame inversion signal. . the lc driver output pin ? s output voltage level can be set using the line latch output signal and the fr signal. table of truth values is shown in t able 4. md mode selection pin . when set to v ss level ? l ? , 4-bit parallel input mode is set. . when set to v dd level ? h ? , 8-bit parallel input mode is set. . the relationship between the display data and driver output pins is shown in t able 5. s/c segment mode / common mode selection pin . when set to v dd level ? h ? , segment mode is set. eio 1 eio 2 input / output pin for chip selection . when l/r input is at v ss level ? l ? , eio 1 is set for output, and eio 2 is set for input. . when l/r input is at v dd level ? h ? , eio 1 is set for input, and eio 2 is set for output. . during output. set to ? h ? while lp*xclkb is ? h ? and after 160-bits of data have been read, set to ? l ? for one cycle (from falling edge to falling edge of xck), after which it returns to ? h ? . . during input, after the lp signal is input, the chip is selected while ei is set to ? l ? . after 160-bits of data have been read, the chip is deselected. y 1 ? y 160 lc driver output pins . corresponding directly to each bit of the data latch, one level (v 0 , v 12 , v 43 , or v ss ) is selected and output. table of truth values are shown in t able 4.
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 13 common m ode symbol function v dd logic system power supply pin connects to +2.4 to +5.5v v ss ground pin connects to 0 v v 0r , v 0l v 12r , v 12l v 43r , v 43l power supply pin for lc driver voltage bias. . normally, the bias voltage used is set by a resistor divider. . ensure that voltage are set such that v ss 160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 14 common m ode (continued) dispoffb control input pin for output deselect level . the input signal is level-shifted from logic voltage level to lc drive voltage level, and controls lc drive circuit. . when set to v ss level ? l ? , the lc drive output pins (y 1 - y 160 ) are set to level v ss . . while set to ? l ? , the contents of the shift resister are reset not reading data. when the dispoffb function is canceled, the driver outputs deselect level (v 12 or v 43 ), and the shift data is reading on the falling edge of the lp. that time, if dispoffb removal time can not keep regulation what is shown ac characteristics (page 25), the shift data is not reading correctly. fr ac signal input for lc driving waveform . the input signal is level-shifted from logic voltage level to lc drive voltage level, and controls lc drive circuit. . normally, input a frame inversion signal. . the lc driver output pin ? s output voltage level can be set using the shift register output signal and the fr signal. table of truth values are shown in t able 4. md mode selection pin . when set to v ss level ? l ? , single mode operation is selected, when set to v dd level ? h ? , dual mode operation is selected. di 7 dual mode data input pin . according to the data shift direction of the data shift register, data can be input starting from the 81 st bit. when the chip is used as dual mode, di 7 will be pull-down. when the chip is used as single mode, di 7 won ? t be pull-down. s/c segment mode / c ommon mode selection pin . when set to v ss level ? l ? , common mode is set. di 0 ? di 6 not used . connect di 0 - di 6 to v ss or v dd . avoiding floating. xck not used . xck is pull-down in common mode, so connect to v ss or open. y 1 ? y 160 lc driver output pins . corresponding directly to each bit of the shift register, one level (v0, v12, v43, or vss) is selected and output. table of truth values are shown in t able 4.
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 15 functional operations segment m ode table 4-1. t ruth table fr latch data dispoffb driver output voltage level (y 1 ? y 160 ) l l h v 43 l h h v 5 h l h v 12 h h h v 0 x x l v 5 here, v ss v 5 < v 43 < v 12 < v 0 , h: v dd (+2.4v to +5.5v), l: v ss (0v), x: don ? t care common m ode table 4-2. t ruth table fr latch data dispoffb driver output voltage level (y 1 ? y 160 ) l l h v 43 l h h v 0 h l h v 12 h h h v 5 x x l v 5 here, v ss v 5 < v 43 < v 12 < v 0 , h: v dd (+2.4v to +5.5v), l: v ss (0v), x: don ? t care note: there are two kinds of power supply (logic level voltage, lc drive voltage) for lcd driver, please supply regular voltage which assigned by specification for each power pin. that time ? don ? t care ? should be fixed to ? h ? or ? l ? , avoiding floating.
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 16 r elationship between the display data and driver output pins segment m ode 4-bit p arallel m ode table 5-1. 4-bit parallel mode figure of clock md l/r eio 1 eio 2 data i nput 1st 2nd 3rd .. 38th 39th 40th di 0 y157 y153 y149 .. y9 y5 y1 di 1 y158 y154 y150 .. y10 y6 y2 di 2 y159 y155 y151 .. y11 y7 y3 l l output input di 3 y160 y156 y152 .. y12 y8 y4 di 0 y4 y8 y12 .. y152 y156 y160 di 1 y3 y7 y11 .. y151 y155 y159 di 2 y2 y6 y10 .. y150 y154 y158 l h input output di 3 y1 y5 y9 .. y149 y153 y157 8-bit p arallel m ode table 5-2. 5-bit parallel mode figure of clock md l/r eio1 eio2 data input 1st 2nd 3rd .. 18th 19th 20th di 0 y153 y145 y137 .. y17 y9 y1 di 1 y154 y146 y138 .. y18 y10 y2 di 2 y155 y147 y139 .. y19 y11 y3 di 3 y156 y148 y140 .. y20 y12 y4 di 4 y157 y149 y141 .. y21 y13 y5 di 5 y158 y150 y142 .. y22 y14 y6 di 6 y159 y151 y143 .. y23 y15 y7 h l output input di 7 y160 y152 y144 .. y24 y16 y8 di 0 y8 y16 y24 .. y144 y152 y160 di 1 y7 y15 y23 .. y143 y151 y159 di 2 y6 y14 y22 .. y142 y150 y158 di 3 y5 y13 y21 .. y141 y149 y157 di 4 y4 y12 y20 .. y140 y148 y156 di 5 y3 y11 y19 .. y139 y147 y155 di 6 y2 y10 y18 .. y138 y146 y154 h h input output di 7 y1 y9 y17 .. y137 y145 y153
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 17 common m ode table 5-3. common mode md l/r data transfer direction eio1 eio2 di7 l(shift to left) y 160 ? y 1 output input x l (single) h(shift to right) y 1 ? y 160 input output x l(shift to left) y 160 ? y 81 y 80 ? y 1 output input input h (dual) h(shift to right) y 1 ? y 80 y 81 ? y 160 input output input here, l: v ss (0v), h: v dd (+2.4v to +5.5v), x: don ? t care n ote : ? don ? t care ? should be fixed to ? h ? or ? l ? , avoid floating.
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 18 specifications absolute maximum ratings table 6. absolute maximum ratings parameter symbol conditions applicable pins ratings unit supply voltage (1) v dd v dd -0.3 to +6.5 v v 0 v 0l, v 0r -0.3 to +35 v v 12 v 12l, v 12r -0.3 to v 0 +0.3 v v 43 v 43l, v 43r -0.3 to v 0 +0.3 v supply voltage (2) v 5 v 5l, v 5r -0.3 to v 0 +0.3 v input voltage v i ta=25 c referenced to v ss (0v) di 0 ? di 7 , xck, lp, l/r, md, s/c, eio 1 , eio 2 , dispoffb -0.3 to v dd +0.3 v storage temperature t stg - - -45 to 125 c recommended operating conditions table 7. recommended operating conditions parameter symbol conditions applicable pins min. typ. max. unit supply voltage (1) v dd v dd +2.4 +5.5 v supply voltage (2) v 0 referenced to v ss (0v) v 0l, v 0r +15 +32 v operating temperature t opr - - -20 +85 c n ote : ensure that voltage are set such that v ss v 5 < v 43 < v1 2 < v 0
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 19 dc characteristics segment m ode table 8-1. dc characteristics for segment mode (v ss = v 5 = 0v, v dd = + 2.4 to 5.5v, v 0 = +15 to +32v, ta = -20~85 c) parameter symbol conditions applicable pins min. typ. max. unit v ih 0.8v dd v input voltage v il di 0 -di 7 , xck, lp, l/r, fr, md, s/c,eio 1 , eio 2 , dispoffb 0.2v dd v v oh i oh =-0.4ma v dd -0.4 v output voltage v ol i ol =+0.4ma eio 1 , eio 2 +0.4 v i lih v i =v dd +10 ua input leakage current i lil v i =v ss di 0 -di 7 , xck, lp, l/r, fr, md, s/c,eio 1 , eio 2 , dispoffb -10 ua v 0 =+30v 1.0 1.5 output resistance r on | d v on | =0.5v v 0 =+20v y 1 - y 160 1.5 2.0 k w stand-by current i stb *1 v ss 50.0 ua consumed current(1) ( deselection) i dd1 *2 v dd 2.0 ma consumed current(2) (selection) i dd2 *3 v dd 8.0 ma consumed current i 0 *4 v 0 1.0 ma note : 1 . v dd = +5v, v 0 = +32v, v i = v ss 2 . v dd = +5v, v 0 = +32v, f xck = 14mhz, no-load, ei = v dd the input data is turned over by data taking clock (4-bit parallel input mode) 3 . v dd = +5v, v 0 = +32v, f xck = 14mhz, no-load, ei = v ss the input data is turned over by data taking clock (4-bit parallel input mode) 4 . v dd = +5v, v 0 = +32v, f xck = 14mhz, f lp = 41.6khz, f fr = 80hz, no-load the input data is turned over by data taking clock (4-bit parallel input mode)
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 20 common m ode table 8-2. dc characteristics for common mode (v ss = v 5 = 0v, v dd = + 2.4 to 5.5v, v 0 = +15 to +32v, ta = -20~85 c) parameter symbol conditions applicable pins min. typ. max. unit v ih - 0.8v dd v input voltage v il - di 0 -di 7 , xck, lp, l/r, fr, md, s/c,eio 1 , eio 2 , dispoffb 0.2v d d v v oh i oh = -0.4ma v dd -0.4 v output voltage v ol i ol = +0.4ma eio 1 , eio 2 +0.4 v i lih v i = v dd +10 ua input leakage current i lil v i = v ss di 0 -di 7 , xck, lp, l/r, fr, md, s/c,eio 1 , eio 2 , dispoffb -10 ua v 0 = +30v 1.0 1.5 output resistance r on | d v on | = 0.5v v 0 = +20v y 1 - y 160 1.5 2.0 k w input pull- down current i pd v i = v dd xck, eio 1 , eio 2 , di 7 100.0 ua stand-by current i stb *1 v ss 50.0 ua consumed current(1) i dd *2 v dd 80.0 ua consumed current(2) i 0 *2 v 0 160.0 ua note: 1 . v dd = +5v, v 0 = +32v, v i = v ss 2 . v dd = +5v, v 0 = +32v, f lp = 41.6khz, f fr = 80hz in case of 1/320 duty operation, no-load
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 21 ac characteristics segment m ode 1 table 9-1. ac characteristics for segment mode (v ss = v 5 = 0v, v dd = + 4.5 to + 5.5v, v 0 = +15 to +32v, ta = -20~85 c) parameter symbol conditions min. typ. max. unit shift clock period *1 t wck t r , t f 10 ns 71 ns shift clock ? h ? pulse width t wckh 23 ns shift clock ? l ? pulse width t wckl 23 ns data setup time t ds 10 ns data hold time t dh 20 ns latch pulse ? h ? pulse width t wlph 23 ns shift clock rise to latch pulse rise time t ld 0 ns shift clock fall to latch pulse fall time t sl 25 ns latch pulse rise to shift clock rise time t ls 25 ns latch pulse fall to shift clock fall time t lh 25 ns input signal rise time *2 t r 50 ns input signal fall time *2 t f 50 ns enable setup time t s 21 ns dispoffb removal time t sd 100 ns dispoffb ? l ? pulse width t wdl 1.2 us output delay time (1) t d c l = 15pf 40 ns output delay time (2) t pd1, t pd2 c l = 15pf 1.2 us output delay time (3) t pd3 c l = 15pf 1.2 us n otes : 1 . take the cascade connection into consideration. 2 . (t wck ? t wckh ? t wckl ) / 2 is maximum in the case of high speed operation.
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 22 segment m ode 2 table 9-2. ac characteristics for segment mode (v ss = v 5 = 0v, v dd = + 2.4v to + 4.5v, v 0 = +15 to +32v, ta = -20~85 c) parameter symbol conditions min. typ. max. unit shift clock period *1 t wck t r , t f 10 ns 125 ns shift clock ? h ? pulse width t wckh 51 ns shift clock ? l ? pulse width t wckl 51 ns data setup time t ds 30 ns data hold time t dh 40 ns latch pulse ? h ? pulse width t wlph 51 ns shift clock rise to latch pulse rise time t ld 0 ns shift clock fall to latch pulse fall time t sl 51 ns latch pulse rise to shift clock rise time t ls 51 ns latch pulse fall to shift clock fall time t lh 51 ns input signal rise time *2 t r 50 ns input signal fall time *2 t f 50 ns enable setup time t s 36 ns dispoffb removal time t sd 100 ns dispoffb ? l ? pulse width t wdl 1.2 us output delay time (1) t d c l = 15pf 78 ns output delay time (2) t pd1, t pd2 c l = 15pf 1.2 us output delay time (3) t pd3 c l = 15pf 1.2 us n otes : 1 . take the cascade connection into consideration. 2 . (t wck ? t wckh ? t wckl ) / 2 is maximum in the case of high speed operation.
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 23 t iming characteristics of segment mode t wlph t sl t ld t r t f t ls t lh t wckh t wckl t dh t ds t wck t wdl last data top data t sd lp xck di 0 - di 7 dispoffb figure 3-1. timing characteristics of segment mode t d n ( *) 1 2 t s (*) n : 4 - bit parallel mode 40 8 - bit parallel mode 20 lp xck ei eo figure 3-2. timing characteristics of segment mode
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 24 fr lp dispoffb y 1 ~y 160 t pd1 t pd2 t pd3 [l/r="l"] figure 3-3. timing characteristics of segment mode
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 25 common m ode table 10. ac characteristics of common mode (v ss = v 5 = 0v, v dd = + 2.4v to + 4.5v, v 0 = +15 to +32v, ta = -20~85 c) parameter symbol condition min. typ. max. unit shift clock period t wlp t r , t f 20ns 250 ns v dd =+5.0v 10% 15 ns shift ? h ? pulse width t wlph v dd =+2.5v~+4.5v 30 ns data setup time t su 30 ns data hold time t h 50 ns input signal rise time t r 50 ns input signal fall time t f 50 ns dispoffb removal time t sd 100 ns dispoffb ? l ? pulse width t wdl 1.2 us output delay time (1) t dl cl=15pf 200 ns output delay time (2) t pd1 ,t pd2 cl=15pf 1.2 us output delay time (3) t pd3 cl=15pf 1.2 us t iming characteristics of common mode t wlp t r t f t wlph t su t h t d l t wd l t sd lp eio 2 (di 7 ) eio 1 dispoffb figure 4 -1. t iming characteristics of common mode
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 26 t pd1 t pd2 t pd3 fr lp dispoffb y 1 ~ y 160 [l/r="l"] figure 4 -2. t iming characteristics of common mode
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 27 precaution . precaution when c onnecting or d isconnecting the po wer this lsi has a high-voltage lc driver, so it may be permanently damaged by a high current which may flow if a voltage is supplied to the lc driver power supply while the logic system power supply is floating. the detail is as follows. . when connecting the power supply, connect the lc drive power after connecting the logic system power. furthermore, when disconnecting the power, disconnect the logic system power after disconnecting the lc driver power. . we recommend you connecting the serial resistor (50~100 w ) or fuse to the lc drive power v 0 of the system as a current limiter. and set up the suitable of the resistor in consideration of lc display grade. and when connecting the logic power supply, the logic condition of this lsi inside is insecurity. therefore connect the lc driver power supply after resetting logic condition of this lsi inside on dispoffb function. after that, cancel the dispoffb function after the lc driver power supply has become stable. furthermore, when disconnecting the power, set the lc drive output pins to level v 5 on dispoffb function. after that, disconnect the logic system power after disconnecting the lc drive power. when connecting the power supply, show the following recommend sequence. v dd dispoffb v 0 v dd v ss v ss v dd v 0 v ss figure 5 . connecting the power supply
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 28 connection examples of plural segment drivers eio 2 eio 1 x c k l p m d f r - d i o 7 l/r y160 y1 d i o 0 eio 2 eio 1 x c k l p m d f r - d i o 7 l/r y160 y1 d i o 0 eio 2 eio 1 x c k l p m d f r - d i o 7 l/r y160 y1 d i o 0 top data last data xck lp md fr dio 0 - dio 7 vss 8 eio 1 eio 2 x c k l p m d f r - d i o 7 l/r y1 y160 d i o 0 eio 1 eio 2 x c k l p m d f r - d i o 7 l/r y1 y160 d i o 0 eio 1 eio 2 x c k l p m d f r - d i o 7 l/r y1 y160 d i o 0 top data last data xck lp md fr vdd 8 vss (a) case of l/r = "l" (b) case of l/r = "h" dio 0 - dio 7 figure 6
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 29 timing chart of 4-device casecade connection of segment drivers n 1 2 n 1 2 n 1 2 n 1 2 n 1 2 fr lp xck di 0 -di 7 ei (device a) eo (device a) eo (device b) eo (device c) device a device b device c device d top data last data (*) (*) n:4-bit parallel mode 40 8-bit parallel mode 20 low figure 7
160 com / seg driver for stn lcd preliminary spec. ver. 1.1 KS0794 30 connection examples of plural common drivers eio 2 eio 1 l p m d f r d i 7 l/r y160 y1 d i s p o f f b first last lp vss fr dispoffb vss di vss (vdd) eio 2 eio 1 l p m d f r d i 7 l/r y160 y1 d i s p o f f b eio 2 eio 1 l p m d f r d i 7 l/r y160 y1 d i s p o f f b eio 1 eio 2 l p m d f r d i 7 l/r y1 y160 d i s p o f f b first last lp vss fr dispoffb vdd di vss (vdd) eio 1 eio 2 l p m d f r d i 7 l/r y1 y160 d i s p o f f b eio 1 eio 2 l p m d f r d i 7 l/r y1 y160 d i s p o f f b (a) single mode(shifting toward left) (b) single mode(shifting toward right) figure 8
KS0794 preliminary spec. ver. 1.1 160 com / seg driver for stn lcd 31 eio 2 eio 1 l p m d f r d i 7 l/r y160 y1 d i s p o f f b first1 lp vss fr dispoffb vss di1 vss (vdd) eio 2 eio 1 l p m d f r d i 7 l/r y160 y1 d i s p o f f b y81 y80 eio 2 eio 1 l p m d f r d i 7 l/r y160 y1 d i s p o f f b vdd di2 last1 first2 last2 eio 1 eio 2 l p m d f r d i 7 l/r y1 y160 d i s p o f f b first1 last2 lp vss fr dispoffb vdd di1 vss (vdd) eio 1 eio 2 l p m d f r d i 7 l/r y1 y160 d i s p o f f b y80 y81 eio 1 eio 2 l p m d f r d i 7 l/r y1 y160 d i s p o f f b vdd di2 last1 first2 (c)dual mode(shifting toward left) (d)dual mode(shifting toward right) figure 9

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