Advantech TPC-1770 Manual de usuario descargar pdf (Pagina 38)

TPC-1770/1780 User Manual 30

Appendix A WDT Programming

A.1 Overview

The TPC-1770/1780 cards’ watchdog timer can be used to monitor sys-

tem software operation and take corrective action if the software fails to

function after the programmed period. This section describes the opera-

tion of the watchdog timer, and how to program it.

The watchdog timer is built into the super I/O controller

SMSC SCH3114. It provides the following functions for user program-

ming:

• 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 after time-out.

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Advantech TPC-1770 Manual de usuario Pagina 38