Datasheet

CHAPTER 16 FLASH MEMORY
User’s Manual U18172EJ3V0UD
278
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 via FLPMC register control (sets
; value)
NOP
HALT
BT PFS.0,$ModeOnLoop ; Checks completion of write to specific registers
; Repeats the same processing when an error occurs.
RET
;---------------------------------------------------------------------
; Processing to shift to normal mode
;---------------------------------------------------------------------
ModeOffLoop:
MOV FLCMD,#00H ; Clears FLCMD register
MOV PFS,#00H ; Clears flash status register
MOV PFCMD,#0A5H ; PFCMD register control
MOV FLPMC,#00H ; FLPMC register control (sets value)
MOV FLPMC,#0FFH ; FLPMC register control (inverts set value)
MOV FLPMC,#00H ; Sets normal mode via FLPMC register control (sets value)
BT PFS.0,$ModeOffLoop ; Checks completion of write to specific registers
; Repeats the same processing when an error occurs.
; After the specific sequence is correctly executed, restore
; the CPU clock to its setting before the self programming
MOV MK0,#INT_MK0 ; Restores interrupt mask flag
EI
RET
;---------------------------------------------------------------------
;Data to be written
;---------------------------------------------------------------------
DataAdrTop:
DB XXH
DB XXH
DB XXH