Programming The Watchdog Timer; Watchdog Timer Overview - Advantech GMB-945GC User Manual

Intel® lga775 core 2 duo mini itx motherboard with ddr2/dual lan/4com/pcie x16

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A.1

Programming the Watchdog Timer

The GMB-945GC's watchdog timer can be used to monitor system software opera-

tion and take corrective action if the software fails to function within the programmed

period. This section describes the operation of the watchdog timer and how to pro-

gram it.

A.1.1

The watchdog timer is built in to the super I/O controller W83627DHG. It provides the

following functions for user programming:

Can be enabled and disabled by user's program

Timer can be set from 1 to 255 seconds or 1 to 255 minutes

Generates an interrupt or resets signal if the software fails to reset the timer

before time-out

A.1.2

Programming the Watchdog Timer

The I/O port address of the watchdog timer is 2E (hex) and 2F (hex). 2E (hex) is the

address port. 2F(hex) is the data port. You must first assign the address of register by

writing an address value into address port 2E (hex), then write/read data to/from the

assigned register through data port 2F (hex).

GMB-945GC User Manual

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