UPD78F9500MA-CAC-A Datasheet, PDF (267/342 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcontrollers

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