Program Examples Of Watchdog Timer - Fujitsu F2MCTM-16LX Hardware Manual

CHAPTER 12 WATCHDOG TIMER
12.6

Program Examples of Watchdog Timer

Program example of watchdog timer is given below:
Program Examples of Watchdog Timer
Processing specification
• The watchdog timer is cleared each time in the loop of the main program.
• The main program must be executed once within the minimum interval time of the watchdog timer.
Coding example
WDTC
WTE
;
;---------Main program-------------------------------------
CODE
START:
LOOP:
;---------Vector setting------------------------------------------
VECT
VECT
208
EQU 0000A8H
EQU WDTC:2
CSEG
MOV I:WDTC,#00000011B
CLRB I:WTE
ÅE
User processing
ÅE
BRA LOOP
CSEG ABS=0FFH
ORG 00FFDCH
DSL START
DB 00H
ENDS
END START
;Watchdog timer control
register
;Watchdog control bit
;Stack pointer (SP), already
;initialized
;Start up of watchdog timer
;Select interval time 2
;cycle
;Clear watchdog timer
;Reset vector setting
;Setting to single chip mode
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