Watchdog Timer
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Watchdog Timer
This chapter explains the operation of the NuPRO-840’s watchdog timer.
It provides an overview of watchdog operation and features, as well as a
sample code to help you learn how the watchdog timer works.
Watchdog Timer Overview
The primary function of the watchdog timer is to monitor the NuPRO-
840’s operation and take corrective action if the software fails to function
as programmed. The major features of the watchdog timer are:
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Two-stage
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Enabled and disabled through software control
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Armed and strobed through software control
Watchdog Timer Architecture
Figure 5:
Watchdog Timer Architecture
The NuPRO-840's custom watchdog timer circuit is implemented in a
programmable logic device. The watchdog timer contains a "Control and
Status Register". The register allows the BIOS or user applications to
determine if a watchdog time out was the source of a particular reset.
Summary of Contents for NuPRO-840 DV
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