SZICS NIS-886, User Manual

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NIS-886 User Manual
50
the nonzero initializers.
CR_F7
(0xF7)
Default 0x00
bit7 —— 1: Mouse interrupt will reset WDT count-down
0: Mouse interrupt does Not affect WDT count-down
bit6 —— 1: Keyboard interrupt will reset WDT count-down
0: Keyboard interrupt does Not affect WDT count-down
bit5 —— 1: Enforce WDT issue time-out-value to event
(This bit is Write Only and Self-Clearing)
bit[4:0]: Reserved bit, keep it as default value.
CR[2Dh] bit0 —— 1: GPIO
0: WDTO#
Refer to routine “WDT.C”.
Set the WDT time out value as 10sec., the system will automatically reset when the time
is out.
_ASM {
; Enter configuration mode by double writing (unlock SuperIO chip)
MOV DX, 2eh
MOV AL, 87h
OUT DX, AL
OUT DX, AL
; select wdt ， disable GP50
MOV DX, 2eh
MOV AL, 2Dh
OUT DX, AL
MOV DX, 2fh
IN AL, DX
AND AL, 11111110b ; Clear bit0
OUT DX, AL
; Access logical device 8
MOV DX, 2eh
MOV AL, 07h