protech SP-7755, Руководство пользователя

Страница: 123 / 127

Appendix B Technical Summary
SP-7755 USER MANUAL
Page: B-23
Code example for watch dog timer
Enable watchdog timer and set timeout interval to 30 seconds.
; --------------------Enter to extended function mode-------------------------
mov dx, 2Eh
mov al, 87h
out dx, al
out dx, al
; -----------------Select Logical Device 7 of watchdog timer----------------
mov al, 07h
out dx, al
inc dx
mov al, 07h
out dx, al
;-------------------------Enable Watch dog feature-----------------------------
dec dx
mov al, 30h
out dx, al
inc dx
mov al, 01h
out dx, al
;-------------Set timeout interval as 30seconds and start counting ---------
dec dx
mov al, F6h
out dx, al
inc dx
mov al, 1Eh
out dx, al
;------------------------------Enable Watch PME--------------------------------
dec dx
mov al, FAh
out dx, al
inc dx