Specifications

5
Components and Subsystems
25
Hardware management
TheRTMincludesamodulemanagementcontroller(MMC),whichenablestheRTMto
providelocalIPMCfunctionsforself‐controlandmonitoring.Theabilitytoprovidethese
functionsmakestheRTManintelligentFRU.ItconnectstotheCPM’slocalIPMBandreports
eventsfromitsmanagedsensorstotheCPM,whichsendsthemtotheShelfManager.
TheMMCsubsystemontheRTMconsistsofaATmega128microcontrollerandnon‐volatile
(NV)memory.TheRTM’sMMCissimilartotheMMCusedontheAMCs,andfollowsmanyof
therequire mentsspecifiedinthePICMGAMC.0R2.0AdvancedMezzanineCardBase
Specification.TheMMChasthefollowingfeatures:
ForinformationontheIPMIcommands theMMCrespondstoandthesensorsitmanages,
seeAppendixB,IPMICommandsandManagedSensors,onpage33.
•Conformstothe“Module
Management”sectionofthePICMG
AMC.0specification
•SensorsandI/Ointerfacesthatcanbe
configured
•Alocalpowerinputthatroutesthrough
theIPMCmanagementpower(MP)
feedfromthecarrier
•AsingleI
2
CmanagementlinkoverZone
3IPMB‐Lpins
•Non‐volatilestorageforFRUrecords
includedinsidethemicrocontrollercore
•AnMMCenablecontrolthroughthe
RTM_ENABLE*pin
•Aglobalpayloadresettoforcepayload
devicestotheresetstate
•AnMMCinternalwatchdogtimerthat
providesisolationservicesand
microcontrollerfaultrecovery
•GPIOsforE‐Keycontrol
•Readsthemodulehandleswitchstate
•AnMMCconsoleportinte rface
•AJTAGprogrammingandtestinterface
•A“soft”I
2
Cportforinletandoutlet
temperaturesensors
•DrivesthestandardATCALEDsonthe
RTMforhotswap,service,andpower