PICMG3-3D093原版完整文件

AdvancedTCA?

PICMG?3.3Revision0.93Specification

StarFabric/AdvancedSwitchingforAdvancedTCA?Systems

May13,2003

DONOTSPECIFYORCLAIMCONFORMANCETOTHISDRAFTSPECIFICATION

PICMG3.3DraftRev.0.93

DONOTSPECIFYORCLAIMCONFORMANCETOTHISDRAFTSPECIFICATION

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?Copyright2003,PCIIndustrialComputerManufacturersGroup.

TheattentionofadoptersisdirectedtothepossibilitythatcompliancewithoradoptionofPICMG?specificationsmayrequireuseofaninventioncoveredbypatentrights.PICMG?shallnotberesponsibleforidentifyingpatentsforwhichalicensemayberequiredbyanyPICMG?specification,orforconductinglegalinquiriesintothelegalvalidityorscopeofthosepatentsthatarebroughttoitsattention.PICMG?specificationsareprospectiveandadvisoryonly.Prospectiveusersareresponsibleforprotectingthemselvesagainstliabilityforinfringementofpatents.

NOTICE:Theinformationcontainedinthisdocumentissubjecttochangewithoutnotice.ThematerialinthisdocumentdetailsaPICMG?specificationinaccordancewiththelicenseandnoticessetforthonthispage.Thisdocumentdoesnotrepresentacommitmenttoimplementanyportionofthisspecificationinanycompany'sproducts.

WHILETHEINFORMATIONINTHISPUBLICATIONISBELIEVEDTOBEACCURATE,PICMG?MAKESNOWARRANTYOFANYKIND,EXPRESSORIMPLIED,WITHREGARDTOTHISMATERIALINCLUDING,BUTNOTLIMITEDTOANYWARRANTYOFTITLEOROWNERSHIP,IMPLIEDWARRANTYOFMERCHANTABILITYORWARRANTYOFFITNESSFORPARTICULARPURPOSEORUSE.

InnoeventshallPICMG?beliableforerrorscontainedhereinorforindirect,incidental,special,consequential,relianceorcoverdamages,includinglossofprofits,revenue,dataoruse,incurredbyanyuseroranythirdparty.

CompliancewiththisspecificationdoesnotabsolvemanufacturersofAdvancedTCA?equipment,fromtherequirementsofsafetyandregulatoryagencies(UL,CSA,FCC,IEC,etc.).

PICMG?,CompactPCI?,andthePICMG?andCompactPCI?logosareregisteredtrademarksandAdvancedTCAandATCAaretrademarks,ofthePCIIndustrialComputerManufacturersGroup.

Allotherbrandorproductnamesmaybetrademarksorregisteredtrademarksoftheirrespectiveholders.

TABLEOFCONTENTS

INTRODUCTION 1

Objectives 1

ReferenceDocuments 1

ReferenceSpecifications 2

EnvironmentandRegulatoryDocuments 2

Contributors 3

SpecialWordUsage 3

NameandLogoUsage 4

LogoUse 4

TrademarkPolicy 5

SignalNamingConventions 5

IntellectualProperty 5

TermsandAcronyms 5

PICMG3.0COMPLIANCE 7

Mechanical 7

PowerDistribution 7

Thermal 7

SYSTEMMANAGEMENT 8

Overview 8

PICMG3.3ImplementationRequirements 8

E-KeyingRequirements 8

LinkDescriptor. 8

ConfigurationOptions 10

SpecificStarFabricManagement 11

DATATRANSPORT 12

Introduction 12

PinAssignments 13

ElectricalRequirements 13

BoardElectricalRequirements 13

BoardDCBlockingRequirements 14

STARFABRICTOADVANCEDSWITCHINGMIGRATIONDESIGN 15

Introduction 15

NodeBoardRequirementsforHybridSystem 16

HubBoardRequirementsforHybridSystem 16

APPENDIXAPICMG3.3DESIGNCONSIDERATIONS 18

ExamplePlatform 18

TopologiesandBandwidthConsiderations 18

APPENDIXBREVISIONHISTORY 21

LISTOFFIGURES

Figure1:AdvancedTCA?FabricChannelGenericPinMappings 12

Figure2:MigrationfromStarFabricPICMG3.3SystemtoHybridASPICMG3.4andStarFabricPICMG3.3System 15

Figure3:Dual-DualStarRoutingRequirements 16

Figure4:PICMG3.3EnabledHubBoardwithAdaptiveBridge 17

FIGUREA1:PICMG3.3BASEDCOMMUNICATIONSPLATFORMBLOCKDIAGRAMERROR!BOOKMARKNOTDEFINED.

FIGUREA2:HUBBOARDTOPOLOGIES ERROR!BOOKMARKNOTDEFINED.

LISTOFTABLES

Table1:PICMG3.3LinkTypeExtensions(LEXT–4-bitfield) 9

Table2:StarFabricChannelPortOptions 10

Table3:ExamplePICMG3.3LinkDescriptorInformation 11

Table4:PICMG3.3ChannelOptions 12

Table5:PinMappingsforPICMG3.3ChannelInterfaceOptions 13

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INTRODUCTION

ThePICMG3.3specificationisamemberofthePICMG3.xAdvancedTCATMseriesofspecifications.ThePICMG3.0basespecificationdefinesapoint-to-pointdifferentialpairserialLinkarchitecture.Itissufficientlygenericthatitcanaccommodatemanydifferentlink-levelstandards.PICMG3.3definestheuseofStarFabricwithinanAdvancedTCATMplatform.

StarFabricinterconnectprovidesasolutionforissuesthatnext-generationembeddedequipmentvendorsfacesuchasscalability,high-availability,quality-of-service,andcost.ItbalancesthebenefitsofflexibilityandtheneedtobecompatiblewithexistingPCIsoftware,driver,O/Sandhardwareinfrastructuresothatadopterscanmaintainexistinginvestmentswhilesolvingnext-generationchallenges.

ThePCIExpressBasespecificationwasratifiedbythePCISpecialInterestGroupinJuly,2002.AdditionalPCIExpressTMAddendumsincludingAdvancedSwitchingarenowbeingdeveloped.TheAdvancedSwitchingSpecificationbasedonthePCIExpressTMarchitecture,istargetedatenablingadditionalcommunicationscapabilities,includingagloballyflataddressablefabricusedtoenablestarandmeshtopologies,messagepassing,multicastandbroadcastcapabilities,aswellascongestionmanagementandtransportreliability.

TheStarFabricTradeAssociationdisclosedplanstoensureaseamlessevolutionfromtheStarFabricarchitecturetotheAdvancedSwitchingSpecificationbasedonthePCIExpressTMarchitecture.

StarFabricincorporatesmanyofthefeaturesandcapabilitiesoftheAdvancedSwitchingSpecificationandistargetedatprovidingaPCIcompatible,highlyscalable,switchedinterconnectsolutionforcommunicationapplications.Duetothiscloserelationship,thisspecificationalsoprovidesthecriteriaformigratingfromaPICMG3.3StarFabricbasedplatformtoaPICMG3.4PCIExpressTMplatformifsystemrequirementsdemandhigherbandwidth.

Objectives

Thecontentofthisdocumentisderivedfrom,andisdependentuponthePICMG3.0basespecification.Itisnotintendedasastand-alonedocumentortobeusedseparatelyfromthebasespecification.

PICMG3.3buildsuponthePICMG3.0specificationtomeetthefollowingobjectives:

DefinetheStarFabricsignalstobeusedoverthedataLinkChannelsprovidedbythePICMG3.0basespecification.

SupportovereachPICMG3.0Channelfor2.5GbpsStarFabricLinks.

EstablishtheSystemManagementcriteriaforensuringcompatibilitybetweenPICMG3.3devices.

DefinedesignrulessuchthatdevicescompatiblewithallotherPICMG3.xsubsidiaryspecificationscanbesafelyinsertedinthesamesystem,eveniftheydointer-operate.

ProvideexampletopologiesandexampleimplementationsforBoardandBackplanedevelopers

ReferenceDocuments

Thefollowingsectionslistthepublicationsthatyoucanrefertowhilereadingthisspecification.Mostofthespecificationsreferredtoaresubjecttoperiodicandindependentupdatesandaretheresponsibilityoftheirrespectiveorganizations.Youcanreferencethefollowinglistofpublicationswhilereadingthisspecification.

ReferenceSpecifications

Alldocumentsmaybeobtainedfromtheirrespectiveorganizations.

PCILocalBusSpecification,Revision2.2and2.31PCISpecialInterestGroup,5440SWWestgateDrive#217,Portland,OR97221,Tel:(503)291-2569,Fax:(503)297-1090

PCIExpressBaseSpecification,Revision1.0,PCISpecialInterestGroup,5440SWWestgateDrive#217,Portland,OR97221,Tel:(503)291-2569,Fax:(503)297-1090

PICMG?PoliciesandProceduresforSpecificationDevelopment,Revision1.5,October5,2001,PCIIndustrialComputerManufacturersGroup(PICMG?),401EdgewaterPlace,Suite500,Wakefield,MA01880USA,Tel:781.224.1100,Fax:781.224.1239,

AdvancedTCA?BaseSpecification,PICMG?3.0Revision1.0,PCIIndustrialComputerManufacturersGroup(PICMG?),401EdgewaterPlace,Suite500,Wakefield,MA01880USA,Tel:781.224.1100,Fax:781.224.1239,

ANSI/TIA/EIA-644-A-2001:ElectricalCharacteristicsofLowVoltageDifferentialSignaling(LVDS)InterfaceCircuits,January1,2001

StarFabricArchitectureSpecification,Revision1.0

EnvironmentandRegulatoryDocuments

AllenvironmentandregulatoryrequirementsthatpertaintothePICMG3.3specificationarecitedwithinthePICMG3.0basespecification.

1ReferencetoPCILocalBusSpecificationR2.3issolelytoprovideabaseforVPDkeyworddefinitionswithnointenttorequire2.3complianceinotherrespects.

Contributors

ThefollowingcompaniesparticipatedinthePICMG3.3FinalSubcommitteeballot:

AculabAdvanetBrooktroutBustronicERNI

DiversifiedTechnologyGeneralMicroSystemsGNP

HybriconIntelInterphasePentair

PICMGEuropePigeonPointRittal/KaparelSanmina-SCISBS

SRC

StarGenTekelecTranSwitch

SpecialWordUsage

Inthisspecificationthefollowingkeywords(inboldtext)willbeused:

may: indicatesflexibilityofchoicewithnoimpliedpreference.

should: indicatesflexibilityofchoicewithastronglypreferredimplementation.

shall: indicatesamandatoryrequirement.Designersshallimplementsuchmandatoryrequirementstoensureinterchangeabilityandtoclaimconformancewiththisspecification.

Note: Whennotinboldtext,thewords“may”,“should”,and“shall”arebeingusedinthetraditionalsense;thatis,theydonotadheretothestrictmeaningsdescribedabove.

NameandLogoUsage

ThePCIIndustrialComputerManufacturersGroup'spoliciesregardingtheuseofitslogosandtrademarksareasfollows:

LogoUse

PermissiontousethePICMG?organizationlogoisautomaticallygrantedtodesignatedmembersonlyasstipulatedonthemostrecentMembershipPrivilegesdocument,duringtheperiodoftimeforwhichtheirmembershipduesarepaid.Non-membersofPICMG?maynotusethePICMG?organizationlogo.

ThePICMG?organizationlogomustbeprintedinblackorincolorasshowninthefilesavailablefordownloadfromthemembers’sideoftheWebsite.Thecenterbarofthelogocontainingthephrase"PICMG"issethorizontallyandtheaspectratioofthelogomustbemaintained,butthesizemaybevaried.NothingmaybeaddedtoordeletedfromthePICMG?logo.

Manufacturers’distributorsandsalesrepresentativesmayusetheAdvancedTCA?logos(butnotthePICMG?organizationlogo)inpromotingproductssoldunderthenameofthemanufacturer.

TheuseoftheAdvancedTCA?logosisaprivilegegrantedbythePICMG?organizationtocompanieswhohavepurchasedtherelevantAdvancedTCA?specifications(oracquiredthemasamemberbenefit)andwhobelievetheirproductscomplywiththesespecifications.UseoftheAdvancedTCA?logobyeithermembersornon-membersimpliessuchcompliance.MisuseoftheAdvancedTCA?logosmayresultinPICMG?revokingpermissiontousethem.

TheAdvancedTCA?logosmustbeusedexactlyasshowninthefilesavailablefordownloadfromthePICMG?Website.Theaspectratiosofthelogosmustbemaintained,butthesizesmaybevaried.NothingmaybeaddedtoordeletedfromtheAdvancedTCA?logos.

ColorinformationfortheredelementsoftheAdvancedTCA?logoisasfollows:

Pantone032CVCistheclosestmatch

CMYKcolorsareC:0,M:100,Y:100,K:0.

- RGBisR:237,G:28,B:36

TrademarkPolicy

ThePICMG?nameandlogoareregisteredtrademarksofPICMG?.Registeredtrademarksmustbefollowedbythesymbol,andthefollowingstatementmustappearinallpublishedliteratureandadvertisingmaterialinwhichthelogoappears:

PICMGandthePICMGlogoareregisteredtrademarksofthePCIIndsutrialComputerManufacturersGroup

TheAdvancedTCA?nameandlogoandACTA?nameandlogoaretrademarksofPICMG?inprocessofregistration.Thesetrademarksmustbefollowedbythesymbol,andthefollowingstatementmustappearinallpublishedliteratureandadvertisingmaterialinwhichthelogoappears:AdvancedTCA,ATCA,andtheAdvancedTCAandATCAlogosaretrademarksofthePCIIndsutrialComputerManufacturersGroup

SignalNamingConventions

Allsignalsareactivehighunlessdenotedbyatrailing#symbol.Differentialsignalsaredenotedbyatrailing+(positive)or–(negative)symbol.

IntellectualProperty

ThePICMG3.3specificationconformstotheIntellectualPropertyguidelinesoutlinedinthePICMGPoliciesandProceduresforSpecificationDevelopment.

TermsandAcronyms

Thefollowingtermsandacronymsareusedinspecificwaysthroughoutthisdocument.ThePICMG3.0basespecificationalsoprovidesanextensiveglossaryoftermsthatareusedinthisdocument.

AdvancedSwitching AdvancedSwitchingbasedonthePCIExpress?architectureAS AdvancedSwitchingbasedonthePCIExpress?architecture

ATM AsynchronousTransferMode

CSR ControlandStatusRegister

DSP DigitalSignalProcessor

Enumeration Aninitializationprocessafterresetthatautomaticallyassignseachcomponentinthefabricwithauniqueidentifierandprovidesinformationaboutthetopologyofthefabric.

FID FabricID

IPWAN InternetProtocolWideAreaNetwork

Hopdistance Afigureofmerittoaidindeterminingaggregatebandwidthandlatencycharacteristicsofafabrictopology.

LeafNode AStarFabricedgenodeisdesignatedaseitherarootorleaf.Aleafrequiresresetandenumerationmessagesfromtherootnodeinordertogetintegratedintothefabric.

RootNode AStarFabricedgenodeisdesignatedaseitherarootorleaf.Arootnodeinitiatesfabricresetsandenumeration.

SF StarFabric

TDM TimeDivisionMultiplexing

PICMG3.0COMPLIANCE

ThePICMG3.3specificationiswhollybasedonthePICMG3.0specification,whichfullyaddressesallissueswithregardtomechanicalform,powerdistribution,andthermalcharacteristics.Thenotesprovidedinthissectionareprovidedforcontinuity;noexceptionstothebasespecificationhavebeentaken.

Mechanical

APICMG3.3BoardshallconformtoallthemechanicalspecificationssetforthinPICMG3.0asdetailedbySection2andothersectionsofthePICMG3.0specification.

PowerDistribution

APICMG3.3BoardshallconformtoallthepowerrequirementssetforthinPICMG3.0asdetailedbySection4andothersectionsofthePICMG3.0specification.

Thermal

APICMG3.3BoardshallconformtoallthethermalrequirementssetforthinPICMG3.0asdetailedbySection5andothersectionsofthePICMG3.0specification.

SYSTEMMANAGEMENT

Overview

ThePICMG3.3SystemmanageabilityrequirementsarederivedfromandbaseduponthefeaturesprovisionedinSection3,ShelfManagement,ofthePICMG3.0basespecification.SystemmanageabilityisapplicabletoStarFabricovertheFabricChannels.

TwostateswhereSystemmanageabilityismostevidentinitsinteractionwiththeStarFabricsignalingareduringthefollowing:

Systempower-up

InsertionorextractionofNode,HuborMesh-EnabledBoards.

ThearchitectureofthecontrolinterfacebetweensystemmanagementandtheStarFabricimplementationisbasedonIPMImessaging.IPMImessagingisusedtofacilitatebothElectronic-Keying(E-Keying)andpowerstateprotocolprocesses.Ultimately,theactionstakenbytheNode,Hub,andMesh-EnabledBoards,inordertocomplywiththeE-keyingandpowermanagementmessages,areimplementationdependent.PleaserefertoSection3ofPICMG3.0forfurtherdetailsonE-Keyingandpowermanagement.

PICMG3.3ImplementationRequirements

PICMG3.3enabledBoardsshallsupportE-KeyingbetweentheShelfManagerandtheIPMController.

PICMG3.3enabledBoardsshalladheretotherequirementsofthePICMG3.0basespecification,Section3.ThemostnoteworthyrequirementspertaintoE-Keying,powermanagementandtheexistenceofanIPMControllerontheNode,Hub,andMesh-EnabledBoards.

E-KeyingRequirements

TheE-KeyingmechanismdefinedinSection3.7ofPICMG3.0verifiesthefabriccompatibilitybetweenBoards,therebypreventingpossibledamageormis-operationbetweenBoardshavingtwodifferenttypesoffabrics.UpondetectionofaNode,Hub,orMesh-EnabledBoardduringthepower-onstateorBoardinsertion,theLinkDesignator,LinkType,LinkExtension,andLinkGroupingarereadbytheShelfManagerfromBoardPoint-to-PointConnectivityRecord(s)intheBoardFRUInformation.ViatheBackplanePoint-to-PointConnectivityRecord(s)intheShelfFRUInformation,theShelfManagercandeterminetheotherBoardsintheShelfthatconnecttoChannelsonthePICMG3.3BoardthatisbeingintegratedintotheShelf.BycomparingLinkDescriptorsbetweensuchChannelpartners,theShelfManagerdeterminesiftheyarecompatible.TheShelfManagerdeterminationofmatchingPortsisbasedonacomparisonofeachoftheLinkDescriptorfields.Foreachcompatibilityconclusion,anIPMImessagegoestobothIPMControllersinvolved,statingthattheLinkshouldbeenabledordisabledaugmentedwithadescriptionoftheChannelcapabilitiesrequired.Thisnotificationoccursviathe“SetPortState(Enable)”or“SetPortState(Disable)”commands.Section3ofPICMG3.0detailsthisprocess.

LinkDescriptor

Node,Hub,andMesh-EnabledBoardsshallprovideinformationabouteachLinkintheBoard’sPoint-to-PointConnectivityRecord(s)initsFRUInformation.ThisinformationisrecordedviatheLinkDescriptorwhichhasthefollowingfourfields:

LinkDesignator (12bits)Channelnumber (6bits)Interface (2bits)

00b=BaseInterface01b=FabricInterface

10b=UpdatePortInterface11b=Reserved

Port (4bits)

0–3Flags

LinkType (8bits)00h=Reserved

01h=PICMG3.0BaseInterface02h=PICMG3.1Ethernet

03h=PICMG3.2Infiniband04h=PICMG3.3StarFabric05h=PICMG3.4PCIExpress06h–EFh=Reserved

F0h–FEh=OEM

FFh=Reserved

LinkTypeExtension (4bits)LinkGroupingID (8bits)

LinkDesignator

AllPICMG3.3LinkDesignatorshallidentifytheLinkInterface(FabricorUpdateChannel),theChannelNumber,andwhichPortsareenabled.StarFabricLinksmaybeusedoneithertheFabricInterfaceorUpdateChannel.

LinkType

TheLinkTypefieldshallalwaysbesetto04hdesignatingaPICMG3.3Link.

LinkTypeExtension

TheLinkTypeExtensionfieldaccountsforvariationswithinasubsidiaryspecificationsuchasPICMG

3.3.Table1providesadescriptionforPICMG3.3LinkTypeExtensionvalues.

Table1:PICMG3.3LinkTypeExtensions(LEXT–4-bitfield)

LEXTValue

Description

0000b

StarFabric2.5G

0001b–1000b

ReservedbyPICMG3.3

1001b–1110b

OEM

1111b

Reserved

LinkGroupingID

TheLinkGroupingIDflagisusedtoindicatemultipleChannels,thatareoperatedinconcertonaBoard.AllChannelsoperatedasagrouponaBoardareassignedthesamenon-zerovalue.ForPICMG3.3

Boards,theLinkGroupingIDshallbesettoavalueof00h,indicatinganon-groupedindependentChannel.

ConfigurationOptions

Table2providesadescriptionofthePICMG3.3Portoptions(notincludingmixedtechnologyoptions):

Table2:StarFabricChannelPortOptions

Option

Port0

Port1

Port2

Port3

Description

1

X

Single1X(622Mb/sdatarate)

2

X

X

Single2X(1.25Gb/sdatarate)

3

X

X

X

X

Single4X(2.5Gb/sdatarate)

StarFabricPICMG3.3Channelsshallsupportauto-negotiationfor1X,2X,or4XPortsperChannel.Forthe2Xand4XPortperChannelcases,multipleLinkDescriptorsshouldbeprovidedsothatBoardssupportingdifferentwidthswouldbepermittedtocommunicatebytheE-Keyingconventions.Consider,forexample,aHubBoardthatsupports4XPortsperChannelandaNodeBoard,thatonlysupports1XPortsperChannel,pluggedintoaShelf.IftheLinkDescriptorinformationfortheHubBoardonlyshowed4PortsenabledandtheNodeBoardLinkDescriptorinformationonlyshowed1Port,theE-KeyingsoftwarewoulddeterminethattheLinksareincompatibleandwouldnotenablecommunication.Inordertoresolvethisissue,multipleLinkDescriptorsshouldbeincludedintheHubBoard’sE-KeyinginformationsothattheShelfManagerunderstandsthattheBoardsupports1X,2X,and4XPortperChanneloperation.

WhenusingmultipleE-Keys,allPICMG3.3enabledBoardsshouldprovidetheE-Keysinpreferredorder,suchthattheShelfManagertriestomatchthemostpreferredE-Keyfirst.ThelowerpriorityE-KeyswouldthenonlybeusedwhenthehigherpriorityE-Keysdonotmatch.IntheaboveHubBoardexample,the4XE-Keywouldbefollowedbythe2Xand1XE-Keys.

Foroptions1and2,differenttechnologiesmayberoutedthroughtheunusedPorts.Theseconfigurationsareuser-definedandbeyondthescopeofthisspecification.Table3providestheLinkDescriptorinformationforthethreeidentifiedPICMG3.3Channeloptions.Ineachoftheseexamples,theChannelnumberisassumedtobe2.

Table3:ExamplePICMG3.3LinkDescriptorInformation

Option

Field

Value

Description

1or2or3

LinkDesignator

000101000010

b

ChannelNumber=2;Interface=Fabric;Port0enabled

LinkType

04h

LinkType=PICMG3.3StarFabric

LinkExtension

0000b

LinkExtension=StarFabric2.5G

LinkGrouping

ID

00h

LinkGrouping=0x0(independent)

2or3

LinkDesignator

001101000010

b

ChannelNumber=2;Interface=Fabric;Port0,1enabled

LinkType

04h

LinkType=PICMG3.3StarFabric

LinkExtension

0000b

LinkExtension=StarFabric2.5G

LinkGrouping

ID

00h

LinkGrouping=0x0(independent)

3

LinkDesignator

111101000010

b

ChannelNumber=2;Interface=Fabric;Port0,1,2,3enabled

LinkType

04h

LinkType=PICMG3.3StarFabric

LinkExtension

0000b

LinkExtension=StarFabric2.5G

LinkGroupingID

00h

LinkGrouping=0x0(independent)

SpecificStarFabricManagement

StarFabricincludesoptionalmanagementfeaturesthatcanaddtothereliability,availability,andperformanceofaStarFabricbasedAdvancedTCA?platform.Thesefeaturesincludethefollowing:

Performanceanalysis:EnablesmonitoringoftrafficonStarFabricLinksforexaminingperformanceanderrorstatistics.

Devicemanagement:ProvidesthecapabilitytodeterminethelocationandtypesofdevicesthatareinterconnectedthroughStarFabric.Afterthehardwareenumerationprocess,allthedevicesinterconnectedthroughthefabricareassignedanFID.UsingthisFIDidentifier,anyintelligentnodeinthesystemcanaccesstheCSRsofanyleaforrootnode.

In-bandmanagement:Providesamechanismforin-bandlowlevelsystemmanagementoperationsusingStarFabric.PICMG3.3enabledBoardsmayincludebridgingcapabilitybetweenIPMControllersandStarFabricinordertousethisfeature.

DATATRANSPORT

Introduction

EachAdvancedTCA?FabricChannelprovideseightdifferentialsignalpairsthatareusedforBoard-to-Boardcommunication.Upto16FabricChannelsareprovided,whicharedistributedaccordingtotherequirementsdetailedinSection6ofPICMG3.0.EachFabricChannelusestworowsofconnectionsinZone2.ThegenericpinmappingsareshowninFigure1.

Figure1:AdvancedTCA?FabricChannelGenericPinMappings

nn+1

ATx2+Tx0+

BTx2-Tx0-

CRx2+Rx0+

DRx2-Rx0-

ETx3+Tx1+

FTx3-Tx1-

GRx3+Rx1+

HRx3-Rx1-

Port2 Port3

Port0 Port1

StarFabricsupportsmultiplelanes.Alaneisdefinedasasetofdifferentialsignalpairs(onepairfortransmitandoneforreceive),whichissynonymouswiththePortdefinitioninPICMG3.0.TheChanneltypessupportedinPICMG3.3shallconsistofasinglePort,dualPorts,orquadPorts.TheseChanneloptionsareshowninTable4withtheirassociatedbitanddataratesineachdirectionofthefullduplexPort.Thedataratesaccountforthe8B/10BencodingsontheLinksaswellastheassociatedStarFabricprotocoloverhead.

Table4:PICMG3.3ChannelOptions

Option

Interface

Ports

Basebitrate

Databitrate

1

StarFabric

1

622Mb/s

450Mb/s

2

StarFabric

2

1.25Gb/s

0.9Gb/s

3

StarFabric

4

2.5Gb/s

1.8Gb/s

InthetwooptionsthatcarrymultipleStarFabricPorts,itisassumedthatthe‘n’PortsareaggregatedastoformasinglelogicalChannel.

PinAssignments

ThePICMG3.3specificationsupportstheDualStar,Dual-DualStarandMeshTopologiesspecifiedinSection6ofPICMG3.0,wheretheChannelmappingsforthesetopologiescanbereferenced.

PICMG3.3enabledBoardsshallsupportsingle,dualorquadPortChannelconfigurations.OtherPortconfigurationsarenotsupported.Table5showsthepinassignmentsforeachChannelconfigurationforoneFabricChannel.Table5assumesnouser-definedtechnologiesaremappedontheopenpins.

BoardsthatdonotimplementallfourPortsinaChannelanddonotmapuser-definedtechnologiesontheopenpinsshallterminatetheRXpairsoftheunusedPorts.TheRxsignalsshallbeterminatedwith100Ohmsacrossthepairs(e.g.Rx3+,Rx3-)whentheconnectorforthepairsispresent.

UnusedPorts(eitherStarFabricoruser-defined)forBoardsthatimplementtwoormoreChannelsofPICMG3.3shallbeterminated.RemainingChannels,notusedbythatBoard,arenotrequiredtobephysicallyimplemented.

Table5:PinMappingsforPICMG3.3ChannelInterfaceOptions

AdvancedTCAPins

1PortChannel

2PortChannel

4PortChannel

Tx0+

Port0Tx+

Port0Tx+

Port0Tx+

Tx0-

Port0Tx-

Port0Tx-

Port0Tx-

Rx0+

Port0Rx+

Port0Rx+

Port0Rx+

Rx0-

Port0Rx-

Port0Rx-

Port0Rx-

Tx1+

NC

Port1Tx+

Port1Tx+

Tx1-

NC

Port1Tx-

Port1Tx-

Rx1+

Term

Port1Rx+

Port1Rx+

Rx1-

Term

Port1Rx-

Port1Rx-

Tx2+

NC

NC

Port2Tx+

Tx2-

NC

NC

Port2Tx-

Rx2+

Term

Term

Port2Rx+

Rx2-

Term

Term

Port2Rx-

Tx3+

NC

NC

Port3Tx+

Tx3-

NC

NC

Port3Tx-

Rx3+

Term

Term

Port3Rx+

Rx3-

Term

Term

Port3Rx-

ElectricalRequirements

ThePICMG3.0specificationprovidesdesignrequirementsandlayoutguidelinesforAdvancedTCA?BoardsandBackplanesinordertoinsureinteroperabilityandsignalintegrity.PICMG3.0BackplanesaredesignednottoexceeddefinedsignalintegritylimitsandallBackplanesusedforPICMG3.3systemsshallmeetthecriteriadefinedinSection8ofPICMG3.0.

BoardElectricalRequirements

ThePICMG3.0specificationprovidesrecommendationsforroutingtheFabricChannelsonAdvancedTCA?Boards.Theserecommendationsweredevelopedtosupportaminimumof3.125Gb/sdataratesoneachdifferentialpair.PICMG3.3BackplanesmustadheretotheminimumBackplanerequirementsoutlinedinPICMG3.0,however,PICMG3.3Channelsmustonlyadheretothe622Mb/s

StarFabricrequirements.Theminimumelectricalrequirements,whichguaranteePICMG3.3compliance,areasfollows(Note:TheserelaxedguidelinesonlypertaintoStarFabricLinksonPICM