Datasheet

CHAPTER 16 FLASH MEMORY
User’s Manual U18172EJ3V0UD
267
An example of a program when the command execution time (from write to internal verify) should be minimized in
self programming mode is shown below.
;---------------------------------------------------------------------
;START
;---------------------------------------------------------------------
MOV MK0,#11111111B ; Masks all interrupts
MOV FLCMD,#00H ; Clears FLCMD register
DI
ModeOnLoop: ; Configure settings so that the CPU clock ≥ 1 MHz
MOV PFS,#00H ; Clears flash status register
MOV PFCMD,#0A5H ; PFCMD register control
MOV FLPMC,#01H ; FLPMC register control (sets value)
MOV FLPMC,#0FEH ; FLPMC register control (inverts set value)
MOV FLPMC,#01H ; Sets self programming mode with FLPMC register control
; (sets value)
NOP
HALT
BT PFS.0,$ModeOnLoop ; Checks completion of write to specific registers
; Repeats the same processing when an error occurs.
FlashWrite:
MOVW HL,#DataAdrTop ; Sets address at which data to be written is located
MOVW DE,#WriteAdr ; Sets address at which data is to be written
FlashWriteLoop:
MOV FLCMD,#05H ; Sets flash control command (byte write)
MOV A,D
MOV FLAPH,A ; Sets address at which data is to be written
MOV A,E
MOV FLAPL,A ; Sets address at which data is to be written
MOV A,[HL]
MOV FLW,A ; Sets data to be written
MOV WDTE,#0ACH ; Clears & restarts WDT
HALT ; Self programming is started
MOV A,PFS
CMP A,#00H
BNZ $StatusError ; Checks write error
; Performs abnormal termination processing when an error
; occurs.
INCW HL ; address at which data to be written is located + 1
MOVW AX,HL
CMPW AX,#DataAdrBtm ; Performs internal verify processing
BNC $FlashVerify ; if write of all data is completed