RadiSys ATCA-5400 RTM Dokumentacja Pobierz pdf (Strona 39)

Super I/O chip

TheICHSMBusconsistsofatransmitdatapathandhostcontroller.Thetransmitdatapath

providesthedataflowlogicneededtoimplementthesevendifferentSMBuscommand

protocolsandiscontrolledbythehostcontroller.TheRTCclockstheICHSMBuscontroller

logic.

Thehostcontroller’s programmingmodelhastwosegments:aPCIconfigurationanda

systemI/Omapping.Allstaticconfigurations,suchastheI/Obaseaddress,areconfigured

viathePCIconfigurationspace.Real‐timeprogrammingofthehostinterfaceisdonein

systemI/Ospace.

Super I/O chip

AWinbondW83627superI/Ochipprovidesdualserialportsandvoltagemonitorstothe

CPU.OntheCPM,thesuperI/OisconnectedtotheICHthroughtheLPCbusandisused

primarilyforserialconnectivityandvoltagemonitoring.

BothoftheCPMCOMportsareconnectedtothe

COMuxCPLD.Theserialconnectionto

thefrontpanel(COM1)supportsdualhardwarehandshakingandimplementsthe

followingsignals:TXD,RXD,DTR,RTS,DSRandCTS.TheserialconnectiontotheRTM

(COM2)supportsTXDandRXDonly.Softwarehandshakingispossible.

TPM chip

TheTrustedPlatformModule(TPM)chipisasecuritykeygeneratorandakeycache

managementdeviceforstoringsecurecryptographickeys.TheTPMmoduleisaccessible

throughtheLPCbus.

TheBIOSTPMcodeisinvokedatspecificinstancesduringPOSTbootexecution,and

providesintegrityauthenticationduringthebootprocess.

SAS and SATA

TheSASandSATAconnectionsarediagrammedinFigure 7onpage 40.

SAS

AnRTMsuchastheATCA‐5400isrequiredforaSASconnectionbecausetheSAS

controllerisontheRTM.ASASharddiskdrivecannotbeusedonaninstalledAMCunless

theRTMispresent.

SATA

TheSATAcontrollerresidesontheCPM,soanRTMisnotrequired.AninstalledAMCcan

useaSATAharddiskdrive,butaSASdriveisnotsupportedfortheAMC.

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RadiSys ATCA-5400 RTM Dokumentacja Strona 39