Datasheet

CHAPTER 16 FLASH MEMORY
User’s Manual U18172EJ3V0UD
265
MOV FLAPLC,#0FFH ; Fixes FLAPLC to “FFH”
MOV WDTE,#0ACH ; Clears & restarts WDT
HALT ; Self programming is started
MOV A,PFS
CMP A,#00H
BNZ $StatusError ; Checks blank check error
; Performs abnormal termination processing when an error
; occurs.
MOV FLCMD,#00H ; Clears FLCMD register
ModeOffLoop:
MOV PFS,#00H ; Clears flash status register
MOV PFCMD,#0A5H ; PFCMD register control
MOV FLPMC,#00H ; FLPMC register control (sets value)
MOV FLPMC,#0FFH ; FLPMC register control (inverts set value)
MOV FLPMC,#00H ; Sets normal mode via FLPMC register control (sets value)
BT PFS.0,$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
BR StatusNormal
;---------------------------------------------------------------------
;END (abnormal termination processing); Perform processing to shift to
normal mode in order to return to normal processing
;---------------------------------------------------------------------
StatusError:
;---------------------------------------------------------------------
;END (normal termination processing)
;---------------------------------------------------------------------
StatusNormal: