UPD78F9500MA-CAC-A Datasheet, PDF (248/342 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcontrollers

CHAPTER 16 FLASH MEMORY
An example of the program that shifts the mode to self programming mode is shown below.
;----------------------------
;START
;----------------------------
MOV
MK0,#11111111B
MOV
FLCMD,#00H
; Masks all interrupts
; Clear FLCMD register
DI
ModeOnLoop:
MOV
MOV
MOV
MOV
MOV
PFS,#00H
PFCMD,#0A5H
FLPMC,#01H
FLPMC,#0FEH
FLPMC,#01H
; Configure settings so that the CPU clock ≥ 1 MHz
; Clears flash status register
; PFCMD register control
; FLPMC register control (sets value)
; FLPMC register control (inverts set value)
; 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.
;----------------------------
;END
;----------------------------
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User’s Manual U18172EJ3V0UD