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sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?11 256-byte?memory?card?ic description sc23m42? is? a? smart? card? module? utilizing? cmos? eeprom technology.? 256? bytes? main? memory,? 32- bit? protection? memory,? 3 bytes? user? password,? and? 3- bit? password? wrong? counter? (value: 00000d2d1d0).? and? the? periphery? interface? is? compa tible? with iso7816?agreement?(synchronous?propagation). features *?256?x?8?bit?eeprom *?byte?addressing *?write-protect? area?(former? 32?bytes)? can?execute?the?write- protect separately,? and? after? the? write- protect,? the? content? cannot? be changed. *?32?x?1bit??protect?memory *?serial?two?buses?interface *?more?than?100,000?times?write?endurance?cycles *?data?retention?of?more?than?10?years * contact? definition? and? serial? interface? comply? to? iso7816 specification?(synchronous?propagation) *?3?bytes?user?password,?3?bits(bit0-bit2)?error?counter *? before? the? password? is? checked,? all? the? data? can? be? read;? if? the password? is? correct,? you? can? write? or? amend? the? data? and? the password. *? password? error? counter,? and? the? initial? value? is? 3.? checking? the password? once, ? subtracts? 1,? if? ?the? value? of? the? counter?is?0,? the memory? card? will? be?locked? automatically,? and?the? data? can? only be?read,?the?password?cannot?be?checked?again;?when?the?value of?the?counter?is?not?0,?if?the?password?checking?is?correct?for?one time,??the?value?comes?back?to?initial?value. *?comply?to?sle4442 ordering?information device package SC23M42A? p6-05 sc23m42b? mcts012402 applications *?used?for?various?ic?memory?cards.
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?11 block?diagram eeprom high?voltage?generator reference?current?generator address decoder address?and?data register, comparator program control power?on?reset?detector timing?and?encipher?logic interface v cc gnd i/o rst clk absolute?maximum?ratings characteristics symbol ratings unit power?supply?voltage v cc -0.3~6 v input?voltage v i -0.3~6 v storage?temperature t stg -40~125 c power?dissipation p d 70 mw dc?electrical?characteristics ?(v cc =5v,?t amb ?=25 c) characteristics symbol condition min. typ. max. unit power?supply?voltage v cc 2.4 -- 5.5 v operating??current i cc -- 3 10 ma h?input?voltage(i/o,?clk,?rst) v ih 3.0 -- v cc v l?input?voltage(i/o,?clk,?rst) v i 0 -- 1.2 v h?input?current(i/o,?clk,?rst) i h -- 3 5 m a l?output?current(v l =0.4v,open-drain) i ol 0.5 1.0 -- ma h? leakage? current(v h =v cc ,? open- drain) i oh -- -- 1 m a input?capacitance c i -- -- 10 pf operating?frequency f osc 7 20 50 khz
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?11 ac?electrical?characteristics ?(unless?otherwise?specified,?v cc =5.0v,?t amb =25 c,?and?testing?frequency?is?20?khz) characteristics symbol condition min. typ. max. unit reset?time t re 9 -- -- m s clk?(high?level) t h 10 -- -- m s clk?(low?level) t l 10 -- -- m s write?time t w 5 -- -- ms erase?time t e 5 -- -- ms set-up?time(d/clk) t d1 4 -- -- m s set-up?time?(clk/rst) t d3 4 -- -- m s set-up?time?(rst/clk) t d4 4 -- -- m s hold?time?(d/clk) t d5 4 -- -- m s delay?time?(clk/d) t d2 6 -- -- m s rise?time?(i/o,?clk,?rst) t r -- -- 1 m s fall?time?(i/o,?clk,?rst) t f -- -- 1 m s pin?configuration 1 2 3 4 8 7 6 5 v cc rst clk nc nc nc i/o gnd ( contact?of?the?card ) pin?descriptions pin?no. symbol i/o description 1 v cc -- power?supply?voltage?is?5v 2 rst i reset?signal 3 clk i clock?signal 4 nc -- no?connect 5 gnd -- ground 6 nc -- no?connect 7 i/o i/o data?bus(open-drain?output) 8 nc -- no?connect
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?11 function?descriptions sc23m42?provides?2568?bits?eeprom?memory?units?and?321?protect?units,?and?there?is?writing-protect?for the?former?32-bit?bytes.?except?psc?(programmable?security?code)?memory?unit,?all?units?are?readable.?the?unit can?be?erased?and?written?before?the?write-protect?is?active,?or?else?the?unit?is?only?readable?after?the?write-protect. the?bit? with?write-protection?can?be?programmed?only?once,?and?cannot?be?erased.? the?chip?has?one?3-bit?(bit0- bit2)error?register?which?provides?3?times?continuous?psc?authentication?at?most,?after?3?times?the?chip?cannot?be erased?and?written. transmission?protocols transmit?the?data?by?serial?two?buses?between?ifd?and?ic?memory?cards. the?transmission?protocols?can?be?defined?as?four?operation?mathods -reset?and?reset?acknowledge -command -output?the?data -process 1. reset?and?reset?acknowledge the?chips?enter?the?power?on?reset?state?when?it?is?power?on,?and?this?state?will?be?ended?by?the?reset?signal. the?reset?signal?begins?when?rst?changed?from?0??to??1??and?end?when?clk?changed?from??0?to?1?.?the?reset signal? can? stop? any? active? instruction.? read? operation? must? be? carried? out? first? after? power? on? reset,? then? the other?operations. the? reset? acknowledge? complies? to? iso7816-3? synchronous? propagation.? the? address? counter? is? set? to? ?0? automatically?and?will?send?the?first?data?to?the?i/o?port.?as?the?clock?signal,?the?address?data?can?be?read?serially. and?the?content?of?the?former?4?eeprom?address?units?can?be?read?after?the?continuous?32?clock?pulses,?and then?the?33 rd ?clock?pulse?will?set?i/o?to?h?state.?the?details?refer?to?the?figure?1. figure?1?reset?and?reset?acknowledge byte?1 byte2 byte3 byte4 reset?acknowledge ?(hex) do 7 ? do 0 do 15 ? do 8 do 23 ? do 16 do 31 ? do 24
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?11 2. instruction?format instruction?table byte1control byte2?address byte3?data b7b6b5b4 b3b2b1b0 a7-a0 d7-d0 operation method 0?0?1?1 0?0?0?0 address?bit invalid read?the?main?memory output?data 0?0?1?1 1?0?0?0 address?bit input?data write?the?main?memory process 0?0?1?1 0?1?0?0 invalid invalid read?protect?memory output?data 0?0?1?1 1?1?0?0 address?bit input?data write?protect?memory process 0?0?1?1 0?0?0?1 invalid invalid read?password?memory output?data 0?0?1?1 1?0?0?1 address?bit input?data amend?password?memory? process 0?0?1?1 0?0?1?1 address?bit input?data compare? authentication data process figure?2?command?input?time?sequence 1 2 0 7 8 9 10 15 16 17 18 23 24 command clk i/o start from?ifd b0 b1 b6 b7 a0 a1 a6 a7 d0 d1 d6 d7 ifd?sets?i/o?to?level?l stop from?ifd 3. instruction?description 1)?read?main?memory control address data b7 b6 b5 b4 b3 b2 b1 b0 a7? ?a0 d7? d0 binary 0 0 1 1 0 0 0 0? address no?effect hex 30h 00h? ffh no?effect this?command?will?read?the?data?from?current?byte?address?n?to?the?last?address?and?the?needed?pulse?number m=(256-n)?8+1
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?11 2)?write?main?memory control address data b7 b6 b5 b4 b3 b2 b1 b0 a7? ?a0 d7? d0 binary 0 0 1 1 1 0 0 0? address input?data hex 38h 00h? ffh input?data this? command? writes? the? main? memory? in? bytes.? according? to? the? new? and? old? data,? carry? out? one? of? the operations?below?in?process?mode: erase?and?write??????(5ms)?corresponding?pulse?number?m=245 only???erase???????????(2.5ms)?corresponding?pulse?number?m=124 only?write??????????(2.5ms)?corresponding?pulse?number?m=124 (all?the?time?value?is?calculated?according?to?the?50?khz?clock?frequency.) 3)??read?protect?memory control address data b7 b6 b5 b4 b3 b2 b1 b0 a7? ?a0 d7? d0 binary 0 0 1 1 0 1 0 0? no?effect no?effect hex 34h no?effect no?effect this? command? will? read? the? content? of? all? the? protect? memory? (32bit),? and? display? that? whether? the? data? of corresponding?address?unit?can?be?changed.
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?7?of?11 4)??write?protect?memory control address data b7 b6 b5 b4 b3 b2 b1 b0 a7? ?a0 d7? d0 binary 0 0 1 1 1 1 0 0? address input?data hex 3ch 00h? 1fh input?data compare?the?command?input?data?and?the?original?data?of?this?unit,?if?they?are?the?same,?then?corresponding write-protect?bit?is?active,?and?the?unit?is?only?readable. 5)?read?password?memory control address data b7 b6 b5 b4 b3 b2 b1 b0 a7? ?a0 d7? d0 binary 0 0 1 1 0 0 0 1 no?effect no?effect hex 31h no?effect no?effect read?the?4?bytes?content?of?password?memory. 6)?change?password?memory control address data b7 b6 b5 b4 b3 b2 b1 b0 a7? ?a0 d7? d0 binary 0 0 1 1 1 0 0 1? address input?data hex 39h 00h? 03h input?data the?password?memory?can?be?changed?after?psc?authentication,?or?else??some?bit?of?error?counter?will?change from??1??to??0?.
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?8?of?11 7)?compare?authentication?data control address data b7 b6 b5 b4 b3 b2 b1 b0 a7? ?a0 d7? d0 binary 0 0 1 1 0 0 1 1? address input?data hex 33h 00h? 03h input?data validate?the?appointed?byte?of?psc?each?time. 4. password?authentication the?sc23m42?is?only?readable?without?psc?authentication.?the?content?of?psc?cannot? be?read,?if?you?try?to read?psc,?you?will?get??00?. the?authentication?steps?are?as?follows: --write?to?one?bit?of?the?error?counter?(ec)?which?has?not?been?written,?and?the?ec?address?is?00?; --input?the?first?byte?data?of?psc?code,?and?the?address?is?01? --input?the?second?byte?data?of?psc?code,?and?the?address?is??02? --?input?the?third?byte?data?of?psc?code,?and?the?address?is??03? --if?pass?the?authentication,?ec?can?be?erased. if? the?initial? value? of? the? error? counter? is? ?00?,? the? error? counter? cannot? be? written,? and? also? cannot? go?through the?password?authentication.?after?the?psc?authentication,?i/o?port?will?change?from??1??to??0??at?the?raising?edge of?the?second?clock?no?matter?pass?the?authentication?or?not.?when?rst?changes?from??0?to?1? i/o?port?returns to??1?.?the?flow?chart?is?as?follows:
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?9?of?11 figure8?psc?authentication?flow?chart
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?10?of?11 package?outline p6-05 unit:?mm mcts012402 unit:?mm
sc23m42 hangzhou?silan?microelectronics?co.,ltd ?rev:1.0???????2006.07.21 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?11?of?11 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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