Lanner NCA-4210 User Manual page 75

NCA-4210 User Manual
A watchdog timer is a piece of hardware that can be used to automatically detect system anomalies and
reset the processor in case there are any problems. A watchdog timer is based on a counter that counts
down from an initial value to zero. The software selects the counter's initial value and periodically restarts it.
Should the counter reach zero before the software restarts it, the software is presumed to be malfunctioning
and the processor's reset signal is asserted. Thus, the processor will be restarted as if a human operator had
cycled the power.
A watchdog timer can be used to control the LAN Bypass function dynamically by programming. Lanner also
provides sample code for bypass control with WDT via programming. For a reference utility that contains
sample code for LAN Bypass function programming, please contact Lanner's technical support.
For thorough implementation information of Lanner Bypass and Watchdog functionalities, go to Lanner
Download Center to download Lanner Bypass Implementation Manual.
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