STC89LE53RC datasheet(128/165 Pages) STC

128 / 165 page

;/*Disable ISP/IAP/EEPROM function, make MCU in a safe state*/

MOV

ISP_CONTR,

#00000000B

;Close ISP/IAP/EEPROM function

MOV

ISP_CMD,

#00000000B

;Clear ISP/IAP/EEPROM command

;MOV

ISP_TRIG,

#00000000B

;Clear trigger register to prevent mistrigger

;MOV

ISP_ADDRH,

;Set address high(00h), Data ptr point to non-EEPROM area

;MOV

ISP_ADDRL,

;Clear IAP address to prevent misuse

SETB

;Set global enable bit

;/*Erase one sector area, there is only Sector-Erase instead of Byte-Erase, every sector area account for 512

bytes*/

MOV

ISP_ADDRH,

#SECTOT_FIRST_BYTE_ADDR_HIGH

;Set the sector area starting address high

MOV

ISP_ADDRL,

#SECTOT_FIRST_BYTE_ADDR_LOW

;Set the sector area starting address low

MOV

ISP_CONTR,

#WAIT_TIME

;Set wait time

ORL

ISP_CONTR,

#10000000B

;Open ISP/IAP function

MOV

ISP_CMD,

#ISP_IAP_SECTOR_ERASE

;Set Sectot-Erase command

MOV

ISP_TRIG,

#46H

;Send trigger command1 (0x46)

MOV

ISP_TRIG,

#0B9H

;Send trigger command2 (0xb9)

NOP

;CPU will hold here until ISP/IAP/EEPROM operation complete

;/*Disable ISP/IAP/EEPROM function, make MCU in a safe state*/

MOV

ISP_CONTR,

#00000000B

;Close ISP/IAP/EEPROM function

MOV

ISP_CMD,

#00000000B

;Clear ISP/IAP/EEPROM command

;MOV

ISP_TRIG,

#00000000B

;Clear trigger register to prevent mistrigger

;MOV

ISP_ADDRH,

;Set address high(00h), Data ptr point to non-EEPROM area

;MOV

ISP_ADDRL,

;Clear IAP address to prevent misuse

128

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