Appendix A Programming The Watchdog Timer; Programming The Watchdog Timer; Watchdog Timer Overview - Advantech AIMB-270 User Manual

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A.1

The AIMB-270's watchdog timer can be used to monitor system software operation

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 into the super I/O controller W83627DHG-P. It provides

the following user-programmable functions:

Can be enabled and disabled by user 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).

AIMB-270 User Manual

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