A: w, Ppendix, Atchdog – NEXCOM NDiS OPS-M50 User Manual
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Copyright © 2012 NEXCOM International Co., Ltd. All Rights Reserved.
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NDiS OPS-M50 User Manual
Appendix A: Watchdog Timer
a
PPendix
a: W
atChdog
t
imer
NDiS OPS-M50 features a watchdog timer that resets the CPU or
generates an interrupt if the processor stops operating for any reason. This
feature ensures system reliability in industrial standalone or unmanned
environments.
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
WDT is reset upon a read or a write to the Game Port base address.
3-2
Reserved
1
Force Time-out. This bit is self-clearing.
WDT Status
0
1: WDT value reaches 0.
0: WDT value is not 0.
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