NEC 78K0S/KU1+ User Manual page 261

MOV FLPMC,#00H
MOV FLPMC,#0FFH
MOV FLPMC,#00H
BT PFS.0,$ModeOffLoop
MOV MK0,#INT_MK0
EI
RET
CHAPTER 16 FLASH MEMORY
; FLPMC register control (sets value)
; FLPMC register control (inverts set value)
; Sets normal mode via FLPMC register control (sets value)
; 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
; Restores interrupt mask flag
User's Manual U18172EJ2V0UD
261