Aaeon AIS-Q454, Manual

Page: 45 / 55

Ad v a n c e d S y s t e m
C o n t r o l l e r
A I S - Q 4 5 4
Appendix A Programming the Watchdog Timer
A-4
Bit Description
7-2 Reserved
1
Returns to the Wait for Key state. This bit is used when the
configuration sequence is completed.
0 Resets all logical devices and restores configuration registers
to their power-on states.
WatchDog Timer Control Register (Index=71h, Default=00h)
Bit Description
7 WDT is reset upon a CIR interrupt
6 WDT is reset upon a KBC (Mouse) interrupt
5 WDT is reset upon a KBC (Keyboard) interrupt
4 Reserved
3-2 Reserved
1
Force Time-out. This bit is self-clearing
0 WDT status
1: WDT value reaches 0
0: WDT value is not 0
WatchDog Timer Configuration Register (Index=72h,
Default=00h)
Bit Description
7 WDT Time-out value select
1: Second
0: Minute
6 WDT output through KRST (pulse) enable
5 WDT Time-out value Extra select
1: 4s.
0: Determine by WDT Time-out value select (bit7 of this
register)
4 WDT output through PWROK1/PWROK2 (pulse) enable
3 Select the interrupt level
note
for WDT