eprom.txt

89c52 eprom 的子程序 可以参考一下

//////////////////STC89C58RD+ ISP FLASH Program sub//2004-12-09////////////////
void ISPWrite(unsigned char AddressL,AddressH,NewData)//(STC89C58RD+)//2004-12-09
{
 UnprotectAM29F040B2();
 ISPADDRH=AddressH;
 ISPADDRL=AddressL;
 ISPCMD&=0xF8;
 ISPCMD|=ISPBYTEPROGRAM;
 ISPDATA=NewData;
 ISPCONTR&=0x18;
 ISPCONTR|=ISPWAITTIME|0X80;//OPEN ISP
 ISPTRIG=0X46;
 ISPTRIG=0XB9;
 _nop_();
 ISPCONTR&=0X7F;//CLOSE ISP
 ISPTRIG=0X00;
}
unsigned char ISPRead(unsigned char AddressL,AddressH)//(STC89C58RD+)//2004-12-09
{
 ISPADDRH=AddressH;
 ISPADDRL=AddressL;
 ISPCMD&=0xF8;
 ISPCMD|=ISPBYTEREAD;
 ISPCONTR&=0x18;
 ISPCONTR|=ISPWAITTIME|0X80;//OPEN ISP
 ISPTRIG=0X46;
 ISPTRIG=0XB9;
 _nop_();
 ISPCONTR&=0X7F;//CLOSE ISP
 ISPTRIG=0X00;
 return(ISPDATA);
}
void ISPEraseSector(unsigned char AddressL,AddressH)//(STC89C58RD+)//2004-12-09
{
 UnprotectAM29F040B2();
 ISPADDRH=AddressH;
 ISPADDRL=AddressL;
 ISPCMD&=0xF8;
 ISPCMD|=ISPSECTORERASE;
 ISPCONTR&=0x18;
 ISPCONTR|=ISPWAITTIME|0X80;//OPEN ISP
 ISPTRIG=0X46;
 ISPTRIG=0XB9;
 _nop_();
 ISPCONTR&=0X7F;//CLOSE ISP
 ISPTRIG=0X00;
}