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1001C 10700470 GT40WR21 MC33375 2C4957 D10SC4M 87631 ZJY51
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  BL7448SM 8k eeprom ?? http://www.belling.com.cn - 1 - 8/16/2006 total 7 pages ? BL7448SM ? 0.35umcmos e 2 prom ic ? ( ? ) 1024 ? , ?? (psc) ? 1024 8 bits e 2 prom ? 1024 1 bits ? ??? ? ? ? ?? ??? 10 ?? 10 ?? ? iso7816 ? ( ? ) ?????? (psc) ????? ? ? 1 ?? c1 vdd ? 5v c2 rst c3 clk ? c4 nc c5 gnd ? c6 nc c7 i/o / ( ? ) c8 nc 1 ? ?? ?? eeprom ??? 2 ? ? ? ? ?/ ? ? ? ??? ? ? eeprom vcc gnd i/o rst clk ? ? ... ec psc psc 3ff 3fe 3fd 04 00 ... 3ff 3fe 3fd 04 00 ? 2 ????
BL7448SM 8k eeprom ?? http://www.belling.com.cn - 2 - 8/16/2006 total 7 pages ] BL7448SM 8k ?? 1024 ?? e 2 prom ( ? ) ? 1024 ?????? ????????????? ????????????? ?????? 0 1 ??? 1 0 ??? ???? ?????? 1 0 ??? 0 1 ?????? BL7448SM ??? ?????????? ec 2 ????? psc ??? ec ??? psc ??? 00 ? ec ?? psc ????? 8 ?????? 5.1 ?? ?? ?? ??  ????y ????y??? rst 0 1 ? clk 0 1 ?????y ????  ? ??????????????? ??? 3 ? v c c r s t c l k i / o 1 2 3 3 1 3 2 ic i /o h ? 1 2 3 3 1 3 2 r s t c l k i / o t d 4 t d 4 t d 2 t h t l t d 5 ? 3 ?
BL7448SM 8k eeprom ?? http://www.belling.com.cn - 3 - 8/16/2006 total 7 pages 5.2 rst ?? i/o ??? 2 rst i/o 1 0 2 rst i/o byte1 byte2 ? ? ? ? byte3 ?? ?? ?? ?? s0 s1 s2 s3 s4 s5 a8 a9 a0~a7 d0~d7 1 0 0 0 1 1 ? 1 1 0 0 1 1 0 0 0 0 1 1 ? ? 0 0 1 1 0 0 0 1 1 1 0 0 ? 3 0 s0 s1 s2 s3 s4 s5 a8 a9 a0 a1 a2 a3 a4 a5 a6 a7 d0 d1 d2 d3 d4 d5 d6 d7 byte 3 data byte 1 control byte rst clk i/o 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 byte 2 address ? 4 ?? 1 / 3 1 / ? ??? /  ? 203 ???? 20khz ? 5  ??? 1 0 103 ???? 20khz ? 6  ??? 0 1 103 ???? 20khz ? 6 ?? 0 1 ? 1 0 s0 s1 d6 d7 command input processing tw te 0 23 0 1 2 99 102 199 202 res clk e / w internal signal i/o ? 5 ?
BL7448SM 8k eeprom ?? http://www.belling.com.cn - 4 - 8/16/2006 total 7 pages 0 23 0 1 2 99 102 s0 s1 d6 d7 only write or erase command input rst clk internal signal i/o td1 0 e / w ? 6 ??? 2 / ? ?????? 3 ?? ????????? / ? i/o ??? 1 0 ? rst ??? 0 1 ? 1/o ?? 2 3  ? ??????? 1 ?? 7 command input data output rst clk a8 a9 d6 d7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 i/o 0 1 2 3 4 5 6 7 starting address random value starting address starting address + 1 starting address + n ? 7 ??  ??? 9bits ?? 8 ? 8bit ? 9 9 ?? ? 1 ?? 8 0 23 command input data output a8 a9 d6 d7 0 1 2 3 4 5 6 7 p0 0 1 2 3 4 5 6 7 p0 p0 0 1 2 3 4 5 6 7 p0 starting address starting address starting address +1 starting address + n random value rst clk i/o ? 8 ??? 3 ? ? ? ? psc ? ? ? ? 4 byte1 byte2 ? ? ? ? byte3 ? ? ? ? ?? ?? ?? ?? 0 1 0 0 1 1 1 1 253 bit mask 1 0 1 1 0 0 1 1 254 psc byte1 ? 1stpscbyte 1 0 1 1 0 0 1 1 255 psc byte2 ? 2ndpscbyte 4 ?
BL7448SM 8k eeprom ?? http://www.belling.com.cn - 5 - 8/16/2006 total 7 pages ?? psc ? BL7448SM ?? psc ??? psc ? 00 1 ??? ??2 ec ? 0 ? ec ?? 1021 psc ???? 1022 ?? psc ?? 1023 ec ?? psc i/o ? 1 0 rst ? 0 1 ? i/o ? 1 ec ?? 9 ec ec ?1st psc byte ? ?2nd psc byte ? ?? ec->ff ?? ?? ?? ? 9 ? 2 ec psc ??? ec ec ? ec ??? ec ???? ec 8 ? ???? ec 3 psc psc ????? ??????
BL7448SM 8k eeprom ?? http://www.belling.com.cn - 6 - 8/16/2006 total 7 pages ??? eeprom ?? psc ??? 1 ? psc ??? ?? 10 s0 s1 d6 d7 rst clk 0 23 0 1 2 102 99 0 0 7 7 0 7 0 1 rst clk d0 d7 i/o psc address control byte psc verification end command input write ec command input verification td4 ? 10 psc ?? 1 ?? ?? ? ? ? ?? v cc -0.3 - 6 v ? v i -0.3 - 6 v ? t stg -40 - 125 p tot 0 - 60 mw ? ta -35 - 70 2 ? ?? ? ? ? ? ?? v cc 3.0 5 5.5 v ? i cc - 3 10 ma h ? (i/o,clk,rst) v h 0.70v cc - v cc +0.3 v l ? (i/o,clk,rst) v l v gnd -0.2 - 0.15v gnd v h (i/o,clk,rst) i h - - 50 m a (i/o) l (v i =0.4v, ) i i 0.5 - -- ma h ? (v h =v cc , ) i h - - 50 m a c i - - 10 pf
BL7448SM 8k eeprom ?? http://www.belling.com.cn - 7 - 8/16/2006 total 7 pages 3 ? ? ? ?? clk 20 khz ???? t h 10 m s ???? t l 10 m s ?? t d1 4 m s ?? d2 6 m s rst ???? t d3 4 m s ?? rst ?? t d4 4 m s ?? t d5 4 m s ?? (f=20khz) t er 5 ms ? (f=20khz) t wr 5 ms


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