ADLINK Technology NuPRO-A301, User Manual

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Watchdog Timer 59
NuPRO-A301
Appendix A - Watchdog Timer
A sample program for configuring the NuPRO-A301’s watchdog
timer is included on the ADLINK CD in the
\WDT directory.
A.1 Sample Code
begin:
;-------------------------------------------------------
; Enter extended function mode, interrupt double-write
;-------------------------------------------------------
mov dx, 2Eh
mov al, 87h
out dx, al
out dx, al
mov dx, 2Eh
mov al, 07h
out dx, al
mov dx, 2Fh
mov al, 08h
out dx, al
mov dx, 2Eh
mov al, 0F7h
out dx, al ;device 8, CRF7
mov dx, 2Fh
mov al, 0C0h
out dx, al
mov dx, 2Eh
mov al, 0F5h ;device 8, CRF5
out dx, al
mov dx, 2Fh
mov al, 00h ;bit 3 -> 0 = second
;bit 3 -> 1 = minute
mov dx, 2Eh
mov al, 0F6h;device 8, CRF6
out dx, al