CHAPTER 16 FLASH MEMORY
User’s Manual U18172EJ2V0UD
256
INCW
DE
; Address at which data is to be w 1
BR FlashWriteLoop
FlashVerify:
MOVW
HL,#WriteAdr
; Sets verify address
MOV
FLCMD,#02H
; Sets flash control command (internal verify 2)
MOV
A,H
MOV
FLAPH,A
; Sets verify start address
MOV
A,L
MOV
FLAPL,A
; Sets verify start address
MOV
A,D
MOV
FLAPHC,A
; Sets verify end address
MOV
A,E
MOV
FLAPLC,A
; Sets verify end address
MOV
WDTE,#0ACH
; Clears & restarts WDT
HALT
; Self programming is started
MOV
A,PFS
CMP
A,#00H
BNZ
$StatusError
; Checks internal verify error
; Performs abnormal termination processing when an error
;
occurs.
MOV
FLCMD,#00H
; Clears FLCMD register
ModeOffLoop:
MOV
PFS,#00H
; Clears flash status register
MOV
PFCMD,#0A5H
; PFCMD register control
MOV
FLPMC,#00H
; FLPMC register control (sets value)
MOV
FLPMC,#0FFH
; FLPMC register control (inverts set value)
MOV
FLPMC,#00H
; Sets normal mode via FLPMC register control (sets value)
BT PFS.0,$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:
