Sun Microsystems CP2500 manual Hardware Environmental Monitoring Functions, 3I2C Components

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TABLE 2-2

Hardware Environmental Monitoring Functions

This section summarizes the hardware environmental monitoring features on the

Netra CP2500 board. lists the environmental monitoring functions on a Netra CP2500 board.

TABLE 2-2Typical Netra CP2500 Board Hardware Environmental Monitoring Functions

Function	Capability

Board Exhaust Air	Senses the air temperature at the trailing edge of the board.
Temperature	Assumes air direction from the PMC slots toward the
	processor/heatsink.
CPU Diode	Senses a diode temperature in the processor junction.
Temperature
Board Inlet Air	Senses the air temperature at the leading edge of the board under
Temperature	the solder-side cover. Assumes air direction from the PMC slots
	toward the processor/heatsink.

TABLE 2-3shows the I2C components.
TABLE 2-3I2C Components

Component	Function

DS80CH11	SMC I2C controller – IPMB
PCF9545	4 channel I2C multiplexor
AT24C64	I2C EEPROM – motherboard FRUID
AT24C01	I2C EEPROM – RTM FRUID and external I2C header
ADM1026	System monitor and general purpose I/O
AT24C64	I2C EEPROM – NVRAM/Ethernet MAC ID
AT24Cxx	I2C EEPROM – DIMM 1 SPD (add-on dependent)
AT24Cxx	I2C EEPROM – DIMM 0 SPD (add-on dependent)
ALi1535D+	Southbridge – SMBUS and I2C controller

FIGURE 2-2shows the location of the environmental monitoring hardware on the Netra CP2500.

28 Netra CP2500 Board Programming Guide • March 2007

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Contents Netra CP2500 Board Programming Guide Page Contents User Flash Figures Vi Netra CP2500 Board Programming Guide March Tables Viii Netra CP2500 Board Programming Guide March Code Samples Netra CP2500 Board Programming Guide March Preface How This Book Is OrganizedUsing Unix Commands Typographic ConventionsShell Prompts Related DocumentationDocumentation, Support, and Training Third-Party Web SitesSun Welcomes Your Comments Watchdog Timer OverviewPicl Plug-In Module 1Watchdog Plug-In Interfaces for Netra CP2500 Board Software 2Properties Under watchdog-controllerNode3Properties Under watchdog-timerNode HEALTHY#Watchdog Node Management Code Code Example 1-1System Watchdog Node Management Code ExampleCode Example 1-1System Watchdog Node Management Code Example Usagestr Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Null Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Code Example 1-1System Watchdog Node Management Code Example Notreached Code Example 1-1System Watchdog Node Management Code Example OpenBoot Prom Interface Netra CP2500 Board Programming Guide March Environmental Monitoring Environmental Monitoring Component Compatibility Typical Environmental Monitoring System Application1Compatible Environmental Monitoring Components I2C Typical Cycle From Power Up to Shutdown Environmental Monitoring Protection at the OpenBoot PromPost Shutdown Recovery Hardware Environmental Monitoring Functions 3I2C ComponentsEnvironmental Monitoring CPU Switching Power On and Off Inlet, Exhaust, and CPU Temperature MonitoringNetra CP2500 Board Programming Guide March OpenBoot Prom Environmental Monitoring Critical Temperature Response at OpenBoot PromUsing the show-sensorsCommand at OpenBoot Prom Environmental Monitoring Application ProgrammingReading Temperature Sensor States Using 4PICL Temperature Sensor Class Node PropertiesUsing a Configuration File for Sensor Information Solaris Driver InterfaceSample Application Program Code Example 2-1Sample envmond Application ProgramCode Example 2-1Sample envmond Application Program Code Example 2-1Sample envmond Application Program Code Example 2-1Sample envmond Application Program Reading the CPU Temperature Environmental Limits Prtdiag command example5Description of Values Displayed by Solaris Commands User Flash User Flash Usage and ImplementationOpenBoot Prom Device Tree and Properties User Flash Driver1User Flash Node Properties Interface Header File Application Programming InterfaceUser Flash Device Files 2System CallsStructures to Use in Ioctl Arguments Code Example 3-1PROM Information StructureErrors Example ProgramsCode Example 3-2User Flash Interface Structure Read Example Program Code Example 3-3Read Action on User Flash DeviceWrite Example Program Code Example 3-4Write Action on User Flash DeviceCode Example 3-4Write Action on User Flash Device Block Erase Example Program Code Example 3-5Block Erase Action on User Flash DeviceCode Example 3-5Block Erase Action on User Flash Device Sample User Flash Application Program Code Example 3-6Sample User Flash Application ProgramCode Example 3-6Sample User Flash Application Program Code Example 3-6Sample User Flash Application Program Code Example 3-6Sample User Flash Application Program Code Example 3-6Sample User Flash Application Program Code Example 3-6Sample User Flash Application Program Index PiclWatchdog-controller, 3 Watchdog-timer, 3