Table of Contents
Advertisement
The System Board features a watchdog timer that reset the CPU or generates an interrupt if
the processor stops operating for any reason. This feature ensures system reliability in
industrial standalone or unmanned environments.
A.1 Watchdog Timer Working Procedure
The Watchdog Timer (WDT) is a special hardware device that monitors the computer system
during normal operation. The WDT has a clock circuit that times down from a set number to
zero. If a monitored item occurs before the timer reaches zero, the WDT resets and counts
down again. If for some reason the monitored item doesn't occur before the timer reaches
zero, the WDT performs an action, such as a diagnostic operation (rebooting the computer) or
generate an NMI.
You must enter timer values into the WDT Configuration Register (Write the control value to
the Configuration Port), and clear (read the Configuration Port).
Table A-1: Watchdog Timer Character and Function
D E L T A
C O M P O N E N T S
G m b H
Auweg27, D-79761 Waldshut-Tiengen Seite - 58 -
Advertisement
Table of Contents
