NEC 78K0S/KB1+ User Manual page 320

CALL
BR
;---------------------------------------------------------------------
;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
MOV
<R> MOV
DI
ModeOnLoop:
<R>
MOV
MOV
MOV
MOV
MOV
NOP
<R>
HALT
<R>
<R> BT
RET
320
CHAPTER 19 FLASH MEMORY
!ModeOff ; Shift to normal mode
StatusNormal
MK0,#11111111B ; Masks all interrupts
MK1,#11111111B
FLCMD,#00H ; Clears FLCMD register
; Configure settings so that the CPU clock ≥ 1 MHz
PFS,#00H ; Clears flash status register
PFCMD,#0A5H ; PFCMD register control
FLPMC,#01H ; FLPMC register control (sets value)
FLPMC,#0FEH ; FLPMC register control (inverts set value)
FLPMC,#01H ; Sets self programming mode via FLPMC register control (sets
; value)
PFS.0,$ModeOnLoop ; Checks completion of write to specific registers
; Repeats the same processing when an error occurs
User's Manual U17446EJ3V1UD