W79E548 Datasheet, PDF (53/79 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E548/W79L548
org 63h
mov TA,#AAH
mov TA,#55H
clr WDIF
jnb execute_reset_flag,bypass_reset
jmp $
bypass_reset:
mov TA,#AAH
mov TA,#55H
setb RWT
reti
; Test if CPU need to reset.
; Wait to reset
start:
;
;
;
org 300h
mov ckcon,#01h ; select 2 ^ 17 timer
mov ckcon,#61h ; select 2 ^ 20 timer
mov ckcon,#81h ; select 2 ^ 23 timer
mov ckcon,#c1h ; select 2 ^ 26 timer
mov TA,#aah
mov TA,#55h
mov WDCON,#00000011B
setb EWDI
setb ea
jmp $
; wait time out
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Publication Release Date: December 12, 2005
Revision A1