Specifications

Hot swap of the CPM and managed FRUs

TheCPManditsmanagedFRUsarehot‐swapcapableandmeetthehot‐swap

requirementsdefinedinthePICMG 3.0Revision 2.0 AdvancedTCABaseSpecification.The

ShelfManagercontrolsthehot‐swapprocess,andtheIPMCenablesanddisablespayload

powertothemanagedFRU s(theAMCandtheRTM)wheninstructedbytheShelf

Manager.

TheIPMCisresponsi bleforenablingpowertotheAMCbayandfordeterminingthe

functionalitythroughE‐Keying.AMCFRUE‐Keyrecordsindicatethetypesofconnections

supportedbytheinstalledAMC.Formoreinformation,refertoAMCbayonpage 44.

AMCsthatuseaPCIExpressconnectiontotheCPMarehandledinaspecialway.TheI/O

controllerhub(ICH)supportsPCIExpresshotplugandparticipatesinPCIExpresslink

training.AhotplugisenabledbythesystemBIOSandIPMCworkinginconjunctionto

allowanAMCtobeaddedtoorremovedfromthesystemwithoutpoweringdownor

resettingtheCPM.

WhentheRTMisinsertedandtheRTMlatchisclosed,asignaltotheIPMCenablestheI

C

bustotheRTM.TheRTMwillbeenabledwhentheIPMCdetectsasupportedRTMviathe

FRUEEPROM.TheIPMCwillconfiguretheI/OexpanderontheRTMviatheI

Cbus,and

thenenablethepayloadpowertotheZone3RTMconnector.

E-Key control of interfaces

ElectronicKeying(E‐Keying)controlisusedtoverifyinterfacecompatibility,prevent

damagetohardware,andpreventincorrectoperation.TheShelfManagercollectsE‐Key

recordsthatdescribetheFabric,Base,updatechannel,andsynchronizationclock

Interfacesimplementedbytheshelfandotherboardsinthesystem.ThePICMG3.0

Revision2.0 AdvancedTCABaseSpecification requirestheCPMtosupportE‐Keycontrol

bydescribingitsbackplaneinterfacestotheShelfManager.Forsomeinterfaces,theCPM

canrespondtoShelfManagercommandsbyisolatingtheinterfacesfromthebackplane.

TheIPMCisusedto:

• DisableandenablePorts0 ‐3oneachFabricchannel.

• CommunicatewiththeModuleManagementController(MMC)ontheAMCtoread

theFRUdataforE‐Keying.

• ControltheCLK3connectionbetweentheCPMandtheCLK3AandCLK3Bbusseson

thebackplane.

• Controltheupdatechannelports.