NEXCOM NDiS 163 - Manual (Page 56)

Copyright © 2009 NEXCOM International Co., Ltd. All Rights Reserved. 43 NDiS 163 User Manual
Appendix A: Watchdog Timer
a
PPendix
a: W
atChdog
t
imer
NDiS 163 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.