Sample Programs - Fujitsu F2MC-16LX Hardware Manual

10.6 Sample Programs

Sample programs for the watchdog timer are shown below.
I Sample programs for watchdog timer
❍ Specifications for processing
• Clears the watchdog timer once per loop of the main program.
• The main loop must complete a circuit within the minimum interval time of the watchdog
timer.
❍ Sample coding
WDTC
WTE
;---------- Main program ------------------------------------------------------
CODE
START:
;
WDG_START:
;---------- Main loop ---------------------------------------------------------
MAIN:
;
;
;
CODE
;---------- Specifying vectors ------------------------------------------------
VECT
VECT
EQU 0000A8H
EQU WDTC:2
CSEG
:
MOV WDTC, #00000011B
CLRB I:WTE
:
User processing
:
JMP MAIN
ENDS
CSEG ABS=0FFH
ORG 0FFDCH
DSL START
DB 00H
ENDS
END START
CHAPTER 10 WATCHDOG TIMER
; Watchdog timer control register
; Watchdog control bit
; Assumption that the stack pointer (SP),
; etc., have been initialized.
; Start of watchdog timer Selection of
± 2
21
;interval time of 2
; Clearing of watchdog timer
; Periodic 2-bit clearing
; Loop time shorter than interval
; time of watchdog timer
; Specifying the reset vector
; Setting to the single-chip mode
18
cycles
213