CHAPTER 18 FLASH MEMORY
User’s Manual U16898EJ3V0UD
312
CALL
!ModeOff
; Shift to normal mode
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:
;---------------------------------------------------------------------
;Processing to shift to self programming mode
;---------------------------------------------------------------------
ModeOn:
MOV
MK0,#11111111B ; Masks all interrupts
MOV
MK1,#11111111B
DI
ModeOnLoop:
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)
MOV
A,PFS
CMP
A,#00H
BNZ
$ModeOnLoop
; Checks completion of write to specific registers
; Repeats the same processing when an error occurs
RET
;---------------------------------------------------------------------
; Processing to shift to normal mode
;---------------------------------------------------------------------
ModeOff:
MOV
PFS,#00H
MOV
PFCMD,#0A5H
; PFCMD register control
MOV
FLPMC,#00H
; FLPMC register control (sets value)