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Contents
Preface xi
1. Watchdog Timer 1
Overview 1
PICL Plug-In Module 2
Watchdog Node Management Code 5
OpenBoot PROM Interface 21
2. Environmental Monitoring 23
Environmental Monitoring Component Compatibility 24
Typical Environmental Monitoring System Application 24
Typical Cycle From Power Up to Shutdown 26
Environmental Monitoring Protection at the OpenBoot PROM 26
Environmental Monitoring Protection at the Operating System Level 26
Post Shutdown Recovery 27
Hardware Environmental Monitoring Functions 28
Switching Power On and Off 31
Inlet, Exhaust, and CPU Temperature Monitoring 31
Adjusting the Environmental Monitoring Warning, Critical, and Shutdown
Parameter Settings on the Board 32
OpenBoot PROM Environmental Monitoring 33