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SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?14 general?32x3?seg?lcd?display?driver?with?1/3?duty descriptions SC230?is?a?general-purpose?external?lcd?driver. features *?support?max.?32 3?lcd?seg *?support?max.?24?keys?input *?1/3?duty,?1/2?bias *?key?input?and?lcd?output?can?be?processed?at?the?same?time *?seg0/p1~seg3/p4?can?be?as?lcd?or?common?output applications *??lcd?driver ordering?information device package SC230 qfp-64-14?x?20-1.0 qfp-64-14x20-1.0 block?diagram wdt basic timer clock timer 8- bit?timer / counter 0 interrupt?control instruction register pc psw sp alu i/ o?ports 288?x 4- bit ram 2/ 4?k?bytes rom lcd driver / controller input?ports reset bias vlc 0 com 0 5 6 3 1 64 33 24 16 21 25 27 32 8 ks 1 ks 4 do ki 1 ki 6 seg31 seg 0 com 2 9 19 18 v dd clk di vlc 2 osc 15 14 11 12 xin xout xtout xtin 10 gnd
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?14 absolute?maximum?rating (t amb =25 c) characteristics symbol ratings unit power?supply v dd -0.3~6.5 v input?voltage v i -0.3~v dd +0.3 v output?voltage v o -0.3~v dd +0.3 v operating?temperature t opr -20~+70 c storage?temperature t stg -40~+125 c electrical?characteristics ?(t amb =25 c,v ss =0v) characteristics symbol test?conditions min. typ. max. unit operating?voltage v dd 4.5 6.0 v v ih1 0.8v dd v dd v input?vtg[h] v ih2 ki1~ki6 0.7v dd v dd v input?vtg[l] v il 0 0.3v dd v oscillator?frequency f osc v dd =5v,?r=33k w 2.0 mhz data?set?time t ds 26 1524 m s data?hold?time t dh 26 1524 m s high?pulse?width t f h 26 1524 m s low?pulse?width t f l 26 1524 m s ce?wait?time t cp 26 1524 m s ce?set?time t cs 26 1524 m s ce?hold?time t ch 26 1524 m s do?delay?time t dc 10 20 m s ce cl di do t & l t & h tds tch tcp tcs do di tdc tch
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?14 pin?configuration pin?descriptions pin?no. symbol pin?descriptions 1 com0 2 com1 3 com2 lcd?com 4,?26 nc no?connection 5 bias lcd?bias?control 6 v lc0 7 v lc1 8 v lc2 lcd?voltage?input 9 17 v dd0 v dd1 power?supply(4.5v~6.0v) 10 v ss ground 11,?12 x out ,?x in crystal?oscillator?input/output 13 test connect?to?ground 14 xt in connect?to?ground 15 xt out no?connection ?(to?be?continued)
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?14 (continued) pin?no. symbol pin?descriptions 16 reset reset?pin(low?active) 18 clk clock?input 19 di serial?data?input 20 ce enable 25 do serial?data?output 21 ks1 22 ks2 23 ks3 24 ks4 key?scan?signal?output 27 ki1 28 ki2 29 ki3 30 ki4 31 ki5 32 ki6 key?signal?input 33 seg0/p1 34 seg1/p2 35 seg2/p3 36 seg3/p4 selectable?lcd?seg 37 seg4 38 seg5 39 seg6 40 seg7 41 seg8 42 seg9 43 seg10 44 seg11 45 seg12 46 seg13 47 seg14 48 seg15 49 seg16 50 seg17 51 seg18 52 seg19 53 seg20 54 seg21 55 seg22 lcd?seg?output (to?be?continued)
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?14 (continued) pin?no. symbol pin?descriptions 56 seg23 57 seg24 58 seg25 59 seg26 60 seg27 61 seg28 62 seg29 63 seg30 64 seg31 lcd?seg?output function?descriptions serial?data?input
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?14 (1)???dd ? frame?data lcd?address ? 42h d1~d96 ? lcd?seg?data d97~d126 ? 0 p0,p1 ? seg0/p1~seg3/p4?function?selection sc ? lcd?switch?selection dr ? 1/2?bias?or?1/3?bias?selection (2)? the?control?data?is?only?in?the?first?frame?(dd=0) control?data?description (1)p0,p1:?seg0/p1~seg3/p4?function?selection control?data port?description p0 p1 seg0/p1 seg1/p2 seg2/p3 seg3/p4 0 0 s0 s1 s2 s3 1 1 p1 p2 p3 p4 port display?data seg0/p1 d1 seg1/p2 d4 seg2/p3 d7 seg3/p4 d10 (2)sc:?lcd?switch?selection sc function 0 lcd?is?on 1 lcd?is?off (3)?dr:1/2?bias?or?1/3?bias?selection dr function 0 1/3?bias 1 1/2?bias
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?7?of?14 lcd?data?and?output use?seg0/p1~seg3/p4?as?display?ports port com0 com1 com2 seg0/p1 d1 d2 d3 seg1/p2 d4 d5 d6 seg2/p3 d7 d8 d9 seg3/p4 d10 d11 d12 seg4 d13 d14 d15 seg5 d16 d17 d18 seg6 d19 d20 d21 seg7 d22 d23 d24 seg8 d25 d26 d27 seg9 d28 d29 d30 seg10 d31 d32 d33 seg11 d34 d35 d36 seg12 d37 d38 d39 seg13 d40 d41 d42 seg14 d43 d44 d45 seg15 d46 d47 d48 port com0 com1 com2 seg16 d49 d50 d51 seg17 d52 d53 d54 seg18 d55 d56 d57 seg19 d58 d59 d60 seg20 d61 d62 d63 seg21 d64 d65 d66 seg22 d67 d68 d69 seg23 d70 d71 d72 seg24 d73 d74 d75 seg25 d76 d77 d78 seg26 d79 d80 d81 seg27 d82 d83 d84 seg28 d85 d86 d87 seg29 d88 d89 d90 seg30 d91 d92 d93 seg31 d94 d95 d96 use?seg0/p1~seg3/?p4?as?general?output?port port com0 com1 com2 seg0/p1 d1 x x seg1/p2 d4 x x seg2/p3 d7 x x seg3/p4 d10 x x seg4 d13 d14 d15 seg5 d16 d17 d18 seg6 d19 d20 d21 seg7 d22 d23 d24 seg8 d25 d26 d27 seg9 d28 d29 d30 seg10 d31 d32 d33 seg11 d34 d35 d36 seg12 d37 d38 d39 seg13 d40 d41 d42 seg14 d43 d44 d45 seg15 d46 d47 d48 port com0 com1 com2 seg16 d49 d50 d51 seg17 d52 d53 d54 seg18 d55 d56 d57 seg19 d58 d59 d60 seg20 d61 d62 d63 seg21 d64 d65 d66 seg22 d67 d68 d69 seg23 d70 d71 d72 seg24 d73 d74 d75 seg25 d76 d77 d78 seg26 d79 d80 d81 seg27 d82 d83 d84 seg28 d85 d86 d87 seg29 d88 d89 d90 seg30 d91 d92 d93 seg31 d94 d95 d96 x=?is?not?considered
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?8?of?14 lcd?data?output?(seg10):?when?use?segxx/p1~segxx/p4?as?display?port lcd??data the?function?of?input?pins d31 d32 d33 seg10 0 0 0 com0,?1,?2,?lcd?seg?off 0 0 1 com2,?lcd?seg?on 0 1 0 com1,?lcd?seg?on 0 1 1 com1,?2,?lcd?seg?on 1 0 0 com0,?lcd??seg?on 1 0 1 com0,?2,?lcd?seg?on 1 1 0 com0,?1,?lcd?seg?on 1 1 1 com0,?1,?2,?lcd?seg?on serial?data?output key?address?:?43h kd1~kd24? :?key?data input selection ki1 ki2 ki3 ki4 ki5 ki6 ks1 kd1 kd2 kd3 kd4 kd5 kd6 ks2 kd7 kd8 kd9 kd10 kd11 kd12 ks3 kd13 kd14 kd15 kd16 kd17 kd18 ks4 kd19 kd20 kd21 kd22 kd23 kd24 if?some?key?is?pressed,?the?corresponding?key?data?is?high?level?keyboard?scan.
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?9?of?14 keyboard?scan 1 keyboard?scan?time keyboard?scan?spends?4t,and?it?should?be?executed?twice.?press?the?corresponding?key,?then?begin?the?key scan?operation,?and?when?the?scan?is?completed?(8t),?output?the?signal?which?is?needed?by?key?data?transmission. 2 key?data?transmission - ? ks1~ks3?pins?are?low?level - ? if?the?key?is?pressed,?execute?the?key?scan - ? if?the?key-press?time?is?over?8t,?the?output?key?data?transmission?request?signal?to?the?host,?if?the?host transmits?a?key?address,?then?begin?to?transmit?the?key?data. - ? if?receive?the?display?address?when?output?the?key?data?request?signal?to?the?host,?then?make?ce=h, do=l. - ? if?the?key?data?transmission?is?completed,?it?will?release?the?request?and?restore?the?key?scan. key?on key?on key?on a b c 8t(s) 8t(s) 8t(s) lcd ?data lcd data key?address lcd data key?address [a ]?key?scan?data [b ]?key?scan?data t?= 2 13 / fx ( fx?=?system?clock ) key?input 1 key?input 2 keyboard scan ce di do
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?10?of?14 key?data?process 1 suppose?that?the?host?receives?the?key?data?in?normal?period t3:?key?scan?time?(8t)? ..the?data?of?the?two?key?scan?is?different(new?key?data?and?already?exist?data) t4:?key?scan?time(16t)? the?data?of?the?two?key?scan?is?the?same(new?key?data?and?already?exist?data) t5:?key?address(43h)transmission?time t6:?key?data?transmission?time????????????????????????????????????????????????t?=2 13 /fx t7:?t7=t5+?t4+lcd?transmission?time???????????????????????????????????(fx?=?system?clock) 2.?suppose?that?the?host?receives?key?data?by?interrupt t3:?key?scan?time?(8t)? ..the?data?of?the?two?key?scan?is?different(new?key?data?and?already?exist?data) t4:?key?scan?time(16t)? the?data?of?the?two?key?scan?is?the?same(new?key?data?and?already?exist?data) t5:?key?address(43h)transmission?time t6:?key?data?transmission?time????????????????????????????????????????????????t?=2 13 /fx t8:?t8=?t4+lcd?transmission?time???????????????????????????????????(fx?=?system?clock)
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?11?of?14 reset port?state?when?reset output state output?buffer close seg0/p1~seg3/p4 output?buffer l output?buffer close seg4~seg31 output?buffer l com0~com2 l ks1~ks4 l do l reset sequence
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?12?of?14 typical?application?circuit c o m 0 c o m 1 c o m 2 s e g 0
SC230 hangzhou?microelectronics?co.,ltd ?rev:1.4??????2004.08.03 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?13?of?14 package?outline qfp-64-14x20-1.0 unit ? mm handling?mos?devices: electrostatic?charges?can?exist?in?many?things.?all?of?our?mos?devices?are?internally?protected?against electrostatic?discharge?but?they?can?be?damaged?if?the?following?precautions?are?not?taken: persons?at?a?work?bench?should?be?earthed?via?a?wrist?strap. equipment?cases?should?be?earthed. ? all?tools?used?during?assembly,?including?soldering?tools?and?solder?baths,?must?be?earthed. mos?devices?should?be?packed?for?dispatch?in?antistatic/conductive?containers.

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