W79E217A Datasheet, PDF (102/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
org
mov
mov
clr
jnb
jmp
bypass_reset:
mov
mov
setb
reti
63h
TA,#AAH
TA,#55H
WDIF
execute_reset_flag,bypass_reset
$
TA,#AAH
TA,#55H
RWT
org
start:
mov
;
mov
;
mov
;
mov
mov
mov
mov
setb
setb
jmp
300h
ckcon,#01h
ckcon,#61h
ckcon,#81h
ckcon,#c1h
TA,#aah
TA,#55h
WDCON,#00000011B
EWDI
ea
$
; Test if CPU need to reset.
; Wait to reset
; Select 2 ^ 17 timer
; Select 2 ^ 20 timer
; Select 2 ^ 23 timer
; Select 2 ^ 26 timer
; Wait time out
Clock Control
WD1, WD0: CKCON.7, CKCON.6 - Watchdog Timer Mode select bits. These two bits select the time-
out interval for the Watchdog Timer. The reset interval is 512 clocks longer than the selected interval.
The default time-out is 2¹⁷ clocks, the shortest time-out period.
- 102 -
Publication Release Date: December 14, 2007
Revision A3.0