Sector Erase - Samsung S3F80JB User Manual

EMBEDDED FLASH MEMORY INTERFACE
PROGRAMMING TIP — Sector Erase
Case1. Erase one sector
ERASE_ONESECTOR:
ERASE_STOP:
Case2.Erase flash memory space from Sector (n) to Sector (n + m)
;;Pre-define the number of sector to erase
ERASE_LOOP:
15-10
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SB1
LD FMUSR,#0A5H
LD FMSECH,#40H
LD FMSECL,#00H
LD FMCON,#10100001B
LD FMUSR,#00H
SB0
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LD SecNumH,#00H
LD SecNumL,#128
LD R6,#01H
LD R7,#7DH
LD R2,SecNumH
LD R3,SecNumL
CALL SECTOR_ERASE
XOR P4,#11111111B
INCW RR2
LD SecNumH,R2
LD SecNumL,R3
DECW RR6
LD R8,R6
OR R8,R7
CP R8,#00H
JP NZ,ERASE_LOOP
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; User program mode enable
; Set sector address 4000H,sector 128,
; among sector 0~511
; Select erase mode enable & Start sector erase
; User program mode disable
; Set sector number
; Selection the sector128 ( base address 4000H )
; Set the sector range (m) to erase
; into High-byte(R6) and Low-byte(R7)
; Display ERASE_LOOP cycle
S3F80JB