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INSTALLATIONS
26
MB820 User’s Manual
mov
cl,
0F5h
call
Read_Reg
and al, NOT 08h
call Write_Reg
;set count mode as second
pop
ax
mov
cl,
0F6h
call
Write_Reg
;set
watchdog
timer
mov
al,
01h
mov
cl,
30h
call
Write_Reg
;watchdog
enabled
call
Lock_Chip
ret
Enable_And_Set_Watchdog Endp
;[]===============================================
; Name : Disable_Watchdog
; IN
: None
; OUT : None
;[]===============================================
Disable_Watchdog Proc Near
call
Unlock_Chip
mov
cl,
07h
mov
al,
08h
call
Write_Reg
;switch
to
LD8
xor
al,
al
mov
cl,
0F6h
call
Write_Reg
;clear
watchdog
timer
xor
al,
al
mov
cl,
30h
call
Write_Reg
;watchdog
disabled
call
Lock_Chip
ret
Disable_Watchdog Endp
;[]===============================================