IS23SC1604芯片介绍.docx

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1、IS23SC1604芯片介绍关键字：ISSI公司IS23SC1604芯片IS23SC1604是采用ISSI公司先进的CMOS技术生产的低成本、低功耗、安全性高的带有保密功能的16K位串行EEPROM。IS23SC1604的安全特性为智能卡应用提供了较高级别的存储器安全保护。存储器分为四个不等分应用区，每个应用区有多个密码保护，能够有效保护对该区的读/写/擦除操作。IS23SC1604的存储区分布如表1所示。表1存储器分布表另外，在每一区都有一个读写允许标志位。其中一、二、三、四区的写允许标志位的位地址（十进制）分别是：216、9816、11904、13992；而一、二、三、四区的读允许标志位的

2、位地址（十进制）分别为：217、9817、11905、13993。是否允许对芯片存储区读写，除了和相应的密码有关之外，还与相应的读写标志有关。以下为IS23SC1604的汇编语言读写程序，仅供有关技术人员参考。;R1=DATATOCHIP;R0=DATAFROMCHIP;R2=8BITCOUNTER;R7=TIMEDELAYCOUNTER;R3=BYTENUMBER;40H=ATRINPUTADDRESS;50H=READDATAOUT;79H=WRITE/ERASEOK/NOTOKID;71H=READDATAADDRESSHIGH8BIT;72H=READDATAADDRESSLOW8BI

3、T;73H=DATABYTE;76H=BYTENUMBER;77H=FIRSTPSCBYTE;78H=SECONDPSCBYTEORG00HSTART:PIN_CLKEQUP1.0PIN_IOEQUP1.1PIN_RSTEQUP1.4PIN_FUSEQUP1.3PIN_PGMEQUP1.2；读复位应答；READ_ATR:MOVR0,40HMOVR3,40HSETBPIN_RSTSETBPIN_CLKSETBPIN_PGMSETBPIN_IOLCALLDELAY_10USCLRPIN_PGMCLRPIN_CLKLCALLDELAY_5USCLRPIN_RSTLOOP_1_BYTE:LCALLRE

4、AD_8_BITMOVR0,AINCR0DJNZR3,LOOP_1_BYTERETADDRESS:MOVP1,0FFHSETBPIN_RSTSETBPIN_CLKSETBPIN_PGMSETBPIN_IOLCALLDELAY_10USCLRPIN_PGMCLRPIN_CLKLCALLDELAY_5USCLRPIN_RSTLCALLDELAY_3USLCALLMUL_8MOVA,71HMOVB,72HORLA,BJZZERO_BACKMOVA,71HJZHIGH_ZEROMOVA,72HJZLOW_ZEROLCALLHIGH_ZLCALLLOW_ZJMPZERO_BACKHIGH_ZERO:LC

5、ALLHIGH_ZJMPZERO_BACKLOW_ZERO:LCALLLOW_ZZERO_BACK:RETHIGH_Z:MOVR0,72HCLK_LOOPH:SETBPIN_CLKLCALLDELAY_3USCLRPIN_CLKLCALLDELAY_3USDJNZR0,CLK_LOOPHRETLOW_Z:MOVR0,0HMOVR1,71HCLK_LOOPL:SETBPIN_CLKLCALLDELAY_3USCLRPIN_CLKLCALLDELAY_3USDJNZR0,CLK_LOOPLDJNZR1,CLK_LOOPLRETMUL_8:MOVR2,03HCLRCMUL_LOOP:MOVA,72H

6、RLCAMOV72H,AMOVA,71HRLCAMOV71H,ADJNZR2,MUL_LOOPRET；读数据；READ_EE:LCALLADDRESSMOVR0,40HMOVR3,76HLOOP_BYTE:LCALLREAD_8_BITMOVR0,AINCR0DJNZR3,LOOP_BYTERET；擦除数据（将字节写成“FFH）；ERASE_BYTE:LCALLADDRESSMOVR3,76HERASE_LOOP:SETBPIN_IOSETBPIN_PGMLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_PGMLCALLDELAY_5MSCLRPIN_

7、CLKLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USMOVC,PIN_IOJNCLOOP_ERASEWRONG;ERASECHECKERRORCLRPIN_CLKDECR3CJNER3,0H,ERASE_NEXTJMPERASE_ENDERASE_NEXT:LCALLREAD_8_BITJMPERASE_LOOPLOOP_ERASEWRONG:MOV79H,00H;SETTHEIDTOZEROERASE_END:RET；写字节（将相应的位写成“0）；WRITE_BYTE:LCALLADDRESSMOVR3,76HMOVR0,30HWRITE_LOOP:MOVA,

8、R0LCALLWRITE_1_BYTEINCR0DJNZR3,WRITE_LOOPRETWRITE_1_BYTE:MOVR2,08HWR_BYTE_LOOP:RLCAJCNEXT_BITCLRPIN_IOSETBPIN_PGMLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_PGMLCALLDELAY_5MSCLRPIN_CLKLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USMOVC,PIN_IOJCLOOP_WRITEWRONG;WRITECHECKERRORCLRPIN_CLKLCALLDELAY_3USJMPSKIP

9、_BITNEXT_BIT:SETBPIN_CLKLCALLDELAY_3USCLRPIN_CLKLCALLDELAY_3USSKIP_BIT:DJNZR2,WR_BYTE_LOOPLOOP_WRITEWRONG:MOV79H,00H;SETWRITEERRORIDTOZERORET；核对密码；COMPAR_CODE:LCALLADDRESSMOVR0,77HMOVR3,76HCOMPAR_LOOP:MOVA,R0LCALLCOMPAREINCR0DJNZR3,COMPAR_LOOPSETBPIN_IORETCODE_VALI:LCALLCOMPAR_CODEMOVR2,08HFIND_NEXT

10、:LCALLDELAY_3USMOVC,PIN_IOLCALLDELAY_3USJCFOUND_ONESETBPIN_CLKLCALLDELAY_3USCLRPIN_CLKDJNZR2,FIND_NEXTJMPNO_ONEFOUND_ONE:CLRPIN_IOSETBPIN_PGMLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_PGMLCALLDELAY_5MSCLRPIN_CLKLCALLDELAY_3USSETBPIN_IOSETBPIN_PGMLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_PGMLC

11、ALLDELAY_5MSCLRPIN_CLKLCALLDELAY_3USNO_ONE:NOPRETCOMPARE:MOVR2,08HLOOP_COMPAR:RLCAMOVPIN_IO,CLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_CLKDJNZR2,LOOP_COMPARRET；熔断熔丝；FUS_BLOW:MOV71H,07HMOV72H,0F4HLCALLBLOW_BYTERETBLOW_BYTE:LCALLADDRESSSETBPIN_CLKLCALLDELAY_3USCLRPIN_CLKLCALLDELAY_3USSETBPIN_RSTLC

12、ALLDELAY_3USCLRPIN_IOSETBPIN_PGMLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_PGMLCALLDELAY_5MSCLRPIN_CLKLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_CLKLCALLDELAY_3USCLRPIN_IOSETBPIN_PGMLCALLDELAY_3USSETBPIN_CLKLCALLDELAY_3USCLRPIN_PGMLCALLDELAY_5MSCLRPIN_CLKLCALLDELAY_3USCLRPIN_RSTLCALLDELAY_3USRETREAD_8_BIT:MOVR2,08HLOOP_8BIT_OUT:SETBPIN_CLKMOVC,PIN_IORLCACALLDELAY_3USCLRPIN_CLKLCALLDELAY_3USDJNZR2,LOOP_8BIT_OUTRETDELAY_10US:MOVR7,05HLOOP_10:DJNZR7,LOOP_10RETDELAY_5US:MOVR7,02HLOP_5:DJNZR7,LOP_5RETDELAY_3US:MOVR7,01HLOP_3:DJNZR7,LOP_3RETDELAY_5MS:MOVR7,0FFHLOOP_5MS:DJNZR7,LOOP_5MSRET1