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NEXCOM NDiS M533 User Manual

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52

NDiS M533 User Manual

Appendix A: Watchdog Timer

CR F2h. Watchdog Timer I(WDT1) Control & Status Register
Location: Address F2h
Attribute: Read/Write
Power Well: VCC
Reset by: LRESET# or PWROK
Default: 00h
Size: 8 bits

Bit

Read/Write

Description

7

R / W

Mouse interrupt reset enables watch-dog timer reload
0: Watchdog Timer I is not affected by mouse interrupt.
1: Watchdog Timer I is reset by mouse interrupt.

6

R / W

Keyboard interrupt reset enables watch-dog timer reload
0: Watchdog Timer I is not affected by keyboard interrupt.
1: Watchdog Timer I is reset by keyboard interrupt.

5

Write “1” Only

Trigger Watchdog Timer I event. This bit is self-clearing.

4

R / W

Write “0” Clear

Watchdog Timer I status bit
0: Watchdog Timer I is running.
1: Watchdog Timer I issues time-out event.

3-0

R / W

These bits select the IRQ resource for the Watchdog Timer I