Datasheet

CHAPTER 16 FLASH MEMORY
User’s Manual U18172EJ3V0UD
258
An example of a program that performs a byte write in self programming mode is shown below.
;----------------------------
;START
;----------------------------
FlashWrite:
MOV FLCMD,#05H ; Sets flash control command (byte write)
MOV FLAPH,#07H ; Sets address to which data is to be written, with
; FLAPH (block 7 is specified here)
MOV FLAPL,#20H ; Sets address to which data is to be written, with
; FLAPL (address 20H is specified here)
MOV FLW,#10H ; Sets data to be written (10H is specified here)
MOV PFS,#00H ; Clears flash status register
MOV WDTE,#0ACH ; Clears & restarts WDT
HALT ; Self programming is started
MOV A,PFS
MOV CmdStatus,A ; Execution result is stored in variable
; (CmdStatus = 0: normal termination, other than 0: abnormal
; termination)
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;END
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