Advantech TPC-1770, User Manual

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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.