PCI_Express规范1.1

PCIExpress™CardElectromechanicalSpecificationRevision1.1March28,2005PCIEXPRESSCARDELECTROMECHANICALSPECIFICATION,REV.1.12RevisionRevisionHistoryDate1.0Initialrelease.7/22/021.0aIncorporatedWGErrataC1-C7andE1.4/15/031.1IncorporatedapprovedErrataandECNs.03/28/05PCI-SIGdisclaimsallwarrantiesandliabilityfortheuseofthisdocumentandtheinformationcontainedhereinandassumesnoresponsibilityforanyerrorsthatmayappearinthisdocument,nordoesPCI-SIGmakeacommitmenttoupdatetheinformationcontainedherein.ContactthePCI-SIGofficetoobtainthelatestrevisionofthespecification.QuestionsregardingthisspecificationormembershipinPCI-SIGmaybeforwardedto:[e-mail]:503-291-2569Fax:[e-mail]essCardElectromechanicalSpecificationisprovided“asis”withnowarrantieswhatsoever,includinganywarrantyofmerchantability,noninfringement,fitnessforanyparticularpurpose,oranywarrantyotherwisearisingoutofanyproposal,specification,orsample.PCI-SIGdisclaimsallliabilityforinfringementofproprietaryrights,relatingtouseofinformationinthisspecification.Nolicense,expressorimplied,byestoppelorotherwise,toanyintellectualpropertyrightsisgrantedherein.PCIExpressisatrademarkofPCI-SIG.Allotherproductnamesaretrademarks,registeredtrademarks,orservicemarksoftheirrespectiveowners.Copyright©2002-2005PCI-SIGPCIEXPRESSCARDELECTROMECHANICALSPECIFICATION,REV.1.13Contents1.INTRODUCTION....................................................................................................................71.1.TERMSANDDEFINITIONS.....................................................................................................71.2.REFERENCEDOCUMENTS.....................................................................................................91.3.SPECIFICATIONCONTENTS...................................................................................................91.4.OBJECTIVES.............................................................................................................................101.5.ELECTRICALOVERVIEW.....................................................................................................101.6.MECHANICALOVERVIEW...................................................................................................112.AUXILIARYSIGNALS........................................................................................................132.1.REFERENCECLOCK...............................................................................................................142.1.1.LowVoltageSwing,DifferentialClocks....................................................................142.1.2.SpreadSpectrumClocking(SSC)...............................................................................152.1.3.REFCLKACSpecifications........................................................................................162.1.4.REFCLKPhaseJitterSpecification...........................................................................192.2.PERST#SIGNAL......................................................................................................................202.2.1.InitialPower-Up(G3toL0).......................................................................................202.2.2.PowerManagementStates(S0toS3/S4toS0)..........................................................212.2.3.PowerDown...............................................................................................................222.3.WAKE#SIGNAL......................................................................................................................242.4.SMBUS(OPTIONAL)...............................................................................................................272.4.1.CapacitiveLoadofHigh-powerSMBusLines...........................................................272.4.2.MinimumCurrentSinkingRequirementsforSMBusDevices....................................282.4.3.SMBus“BackPowering”Considerations.................................................................282.4.4.Power-onReset..........................................................................................................282.5.JTAGPINS(OPTIONAL).........................................................................................................292.6.AUXILIARYSIGNALPARAMETRICSPECIFICATIONS...................................................302.6.1.DCSpecifications.......................................................................................................302.6.2.ACSpecifications.......................................................................................................313.HOTINSERTIONANDREMOVAL..................................................................................333.1.SCOPE....................................................................................................................................333.2.PRESENCEDETECT...................................