RadiSys ATCA-4616 Specifications download pdf (Page 16)

Shelf Management Overview

Management controllers (IPMCs and MMCs)

EachintelligentFRUincludesamanagementcontroller,eitheranIntelligentPlatform

ManagementController(IPMC)oraModuleManagementController(MMC).MostFRUsuse

IPMCs;however,AMCsandintelligentRTMsuseMMCsinstead.IPMCsandMMCsmanage

FRUresourcessuchassensorsandcontrols.

IPMCsarethefirstshelfcomponentstobepoweredup,allowingthemtocontrolpowerto

theresourcestheymanage.AnIPMCcanpoweroffafunctionalblockthatisfailingorthatthe

ShelfManagerinstructstopoweroff.TheIPMCalsogatherssensordataandcommunicates

overtheIPMB.

MMCsperformmanyofthesamefunctionsasIPMCs,includinggatheringsensordata and

providingaccesstotheAMCFRUinventorydata.TheMMCcommunicateswithacarrier

module’sIPMCovertheIPMB‐L.Afterthecarrierispoweredandfullyactive,thepayloadof

eachAMCispoweredupsoitcancontrolpowertotherestoftheAMC.TheAMCsare

poweredupinorderofsitenumber,fromlowesttohighest.Whenacarriermoduleis

extractedaccordingtoproperprocedure,theAMCsitesareshutdowninthereverseorder

thattheywereactivated(lastsitefirst).Thenthecarriermoduleisshutdownandcanbe

safelyremoved.

Sensor data records (SDRs)

Sensordatarecords(SDRs)controlaccesstoanIPMC’sorMMC’smanagedFRUresources,

includingallsensorsandFRUinformation.TheShelfManagerandsystemmanagerhave

knowledgeonlyofsensorsdescribedbySDRs,andtheygainaccesstothemusingDeviceSDR

commandstoquerySDRsovertheIPMB‐0interface.

Non-volatile information storage

EachintelligentFRUstoresinformationaboutitselfinnon‐volatilestorage.Thestored

informationincludes:

•Serialnumber

•Partnumber

• Manufacturer

•Dateandtimeofmanufacture

• Productname

•EC/revisionlevel(whereECisanabbreviationforengineeringchange)

•FRUcapabilities

•Point‐to‐pointconnectivityrecordsformodulesthatplugintothebackplane(whichare

usedfor

electronickeying)

Non‐intelligentFRUsdepend onaproxyFRUtostorethisinformation.InthiscaseaproxyFRU

makestheinformationavailabletotheShelf Manager.

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RadiSys ATCA-4616 Specifications Page 16