Sun Microsystems CP2500 Hardware Environmental Monitoring Functions

28 Netra CP2500 Board Programming Guide • March 2007

Hardware Environmental MonitoringFunctions

This section summarizes the hardware environmental monitoring features on the

Netra CP2500 board. TABLE2-2 lists the environmental monitoring functions on a

Netra CP2500 board.

TABLE2-3 shows the I2C components.

FIGURE2-2 showsthe location of the environmental monitoring hardware on the

Netra CP2500.

TABLE2-2 TypicalNetra CP2500 Board Hardware Environmental Monitoring Functions

Function Capability

BoardExhaust Air

Temperature

Senses the air temperatureat the trailing edge of the board.

Assumes air directionfrom the PMC slots toward the

processor/heatsink.

CPU Diode

Temperature

Senses a diode temperaturein theprocessor junction.

BoardInlet Air

Temperature

Senses the air temperatureat the leading edge of the board under

the solder-sidecover. Assumes air direction from the PMC slots

towardthe processor/heatsink.

TABLE2-3 I2C Components

Component Function

DS80CH11 SMC I2C controller– IPMB

PCF9545 4 channel I2C multiplexor

AT24C64 I2CEEPROM – motherboard FRUID

AT24C01 I2CEEPROM – RTM FRUID and external I2C header

ADM1026 System monitor and general purpose I/O

AT24C64 I2CEEPROM �� NVRAM/Ethernet MAC ID

AT24Cxx I2CEEPROM – DIMM 1 SPD (add-on dependent)

AT24Cxx I2CEEPROM – DIMM 0 SPD (add-on dependent)

ALi1535D+ Southbridge– SMBUS and I2C controller

Contents

Main Page Contents Page Page Page Tables Page Code Samples Page Preface How This Book Is Organized Using UNIX Commands Typographic Conventions Shell Prompts Related Documentation Online documents are available at: http://www.sun.com/documentation Documentation, Support, and Training Third-Party WebSites Sun Welcomes Your Comments Watchdog Timer Overview PICL Plug-In Module Note Page Page Watchdog Node Management Code Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page OpenBoot PROM Interface Page Environmental Monitoring Page Page Typical Cycle From Power Up to Shutdown Environmental Monitoring Protection at the OpenBoot PROM Environmental Monitoring Protection at the Operating System Level Post Shutdown Recovery Hardware Environmental Monitoring Functions Netra CP2500. Page Page Switching Power On and Off Inlet, Exhaust, and CPU Temperature Monitoring Page Note OpenBoot PROM Environmental Monitoring Warning Temperature Response at OpenBoot PROM Critical Temperature Response at OpenBoot PROM Using the show-sensors Command at the OpenBoot PROM Environmental Monitoring Application Programming Reading Temperature Sensor States Using the PICL API Using a Configuration File for Sensor Information Solaris Driver Interface Sample Application Program Page Page } Reading the CPU Temperature and Environmental Limits prtdiag command example: monitoring warning that runs when the CPU temperature exceeds the set limit. User Flash User Flash Usage and Implementation User Flash Driver OpenBoot PROM Device Tree and Properties User Flash Device Files Interface (Header) File Application Programming Interface The ioctl supported commands are listed below: Note that these ioctl commands are not supported: Structures to Use in IOCTL Arguments PROM Information Structure User Flash User Interface Structure The user flash user interface structure holds user parameters to commands such as erase. Errors Example Programs Example programs are provided in this section for the following actions on user flash device: Read Example Program Write Example Program Page Block Erase Example Program Page Sample User Flash Application Program Page Page Page Page Page Index V W