DFI SB630-CRM User Manual download pdf (Page 177)

177

Watchdog Timer

Appendix B - Watchdog Sample Code

;Software programming example:

;---------------------------------------------

;(1) Enter Super IO Conﬁ guration mode

;---------------------------------------------

MOV DX,2EH

MOV AL,87H

OUT DX,AL

;-------------------------------------------------------------------------------------------

;(2) Conﬁ guration Logical Device 7, register CRF5/CRF6 (WDT Control /WDT

timer)

;-------------------------------------------------------------------------------------------

MOV DX,2EH

MOV AL,07H ;Ready to Program Logical Device

OUT DX,AL

MOV DX,2FH

MOV AL,07H ;Select Logical Device 7

OUT DX,AL

MOV DX,2EH

MOV AL, F6H ;Select watchdog timer register

OUT DX,AL

MOV DX,2FH

MOV AL,10H ;Set watchdog timer value

OUT DX,AL

MOV DX,2EH

MOV AL, F5H ;Select watchdog Control Register

OUT DX,AL

MOV DX,2FH

MOV AL,61H ;Set Watchdog Control Value

OUT DX,AL

;----------------------------------------------------------------

;(1) Exit extended function mode

;----------------------------------------------------------------

MOV DX,2EH

MOV AL,AAH

OUT DX,AL

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DFI SB630-CRM User Manual Page 177