PCIE接口定义金手指板卡

PCIExpress(PCIe,PCI-e)isahigh-speedserialcomputerexpansionbusstandard.PCIExpressasahigh-bandwidth,lowpincount,serial,interconnecttechnology.ItwasdesignedtoreplacetheolderPCIandAGPbusstandards.PCIehasnumerousimprovementsovertheolderstandards,includinghighermaximumsystembusthroughput,lowerI/Opincountandsmallerphysicalfootprint,betterperformancescalingforbusdevices,amoredetailederrordetectionandreportingmechanism(AdvancedErrorReporting,AER),andnativehot-swapfunctionality.PCIExpressarchitectureprovidesahighperformanceI/OinfrastructureforDesktopPlatformswithtransferratesstartingat2.5Gigatransferspersecondoverax1PCIExpresslaneforGigabitEthernet,TVTuners,Firewire1394a/bcontrollers,andgeneralpurposeI/O.PCIExpressarchitectureprovidesahighperformancegraphicsinfrastructureforDesktopPlatformsdoublingthecapabilityofexistingAGP8xdesignswithtransferratesof4.0Gigabytespersecondoverax16PCIExpresslaneforgraphicscontrollers.Alaneiscomposedoftwodifferentialsignalingpairs,withonepairforreceivingdataandtheotherfortransmitting.ExpressCardutilizingPCIExpressinterface,developedbythePCMCIAgroupformobilecomputers.PCIExpressAdvancedPowerManagementfeatureshelptoextendplatformbatterylifeandtoenableuserstoworkanywhere,withoutanACpowersource.ThePCIExpresselectricalinterfaceisalsousedinsomecomputerstorageinterfacesSATAExpressandM.2.ThebroadadoptionofPCIExpressinthemobile,enterpriseandcommunicationsegmentsenablesconvergencethroughthere-useofacommoninterconnecttechnology.PCI-Eisaserialbuswhichusestwolow-voltagedifferentialLVDSpairs,at2.5Gb/sineachdirection[onetransmit,andonereceivepair].PCIExpresssupports1x[2.5Gbps],2x,4x,8x,12x,16x,and32xbuswidths[transmit/receivepairs].Thedifferentialpins[Lanes]listedinthepinouttableaboveareLVDSwhichstandsfor:LowVoltageDifferentialSignaling.

PCI-Express1xConnectorPin-OutAl A16PinSideBConnectorSideAConnector#NameDescriptionNameDescription1+12v+12voltpowerPRSNT#1Hotplugpresencedetect2+12v+12voltpower+12v+12voltpower3+12v+12voltpower+12v+12voltpower4GNDGroundGNDGround5SMCLKSMBusclockJTAG2TCK6SMDATSMBusdataJTAG3TDI7GNDGroundJTAG4TDO8+3.3v+3.3voltpowerJTAG5TMS9JTAG1+TRST#+3.3v+3.3voltpower103.3Vaux3.3vvoltpower+3.3v+3.3voltpower11WAKE#LinkReactivationPWRGDPowerGoodMechanicalKey12RSVDReservedGNDGround13GNDGroundREFCLK+ReferenceClock14HSOp(0)TransmitterLane0,REFCLK-Differentialpair15HSOn(0)DifferentialpairGNDGround16GNDGroundHSIp(0)ReceiverLane0,17PRSNT#2HotplugdetectHSIn(0)Differentialpair18GNDGroundGND18GNDGroundGNDGroundPCI-Express4xConnectorPin-OutPinSideBConnectorSideAConnector#NameDescriptionNameDescription1+12v+12voltpowerPRSNT#1Hotplugpresencedetect2+12v+12voltpower+12v+12voltpower3+12v+12voltpower+12v+12voltpower4GNDGroundGNDGround5SMCLKSMBusclockJTAG2TCK6SMDATSMBusdataJTAG3TDI7GNDGroundJTAG4TDO8+3.3v+3.3voltpowerJTAG5TMS9JTAG1+TRST#+3.3v+3.3voltpower103.3Vaux3.3vvoltpower+3.3v+3.3voltpower11WAKE#LinkReactivationPWRGDPowerGoodMechanicalKey12RSVDReservedGNDGround13GNDGroundREFCLK+ReferenceClock14HSOp(0)TransmitterLane0,REFCLK-Differentialpair15HSOn(0)DifferentialpairGNDGround16GNDGroundHSIp(0)ReceiverLane0,

17PRSNT#2HotplugdetectHSIn(0)Differentialpair18GNDGroundGNDGround19HSOp(1)TransmitterLane1,RSVDReserved20HSOn(1)DifferentialpairGNDGround21GNDGroundHSIp(1)ReceiverLane1,22GNDGroundHSIn(1)Differentialpair23HSOp(2)TransmitterLane2,GNDGround24HSOn(2)DifferentialpairGNDGround25GNDGroundHSIp(2)ReceiverLane2,26GNDGroundHSIn(2)Differentialpair27HSOp(3)TransmitterLane3,GNDGround28HSOn(3)DifferentialpairGNDGround29GNDGroundHSIp(3)ReceiverLane3,30RSVDReservedHSIn(3)Differentialpair31PRSNT#2HotplugdetectGNDGround32GNDGroundRSVDReservedPinSideBConnectorSideAConnector#NameDescriptionNameDescription

1+12v+12voltpowerPRSNT#1Hotplugpresencedetect2+12v+12voltpower+12v+12voltpower3+12v+12voltpower+12v+12voltpower4GNDGroundGNDGround5SMCLKSMBusclockJTAG2TCK6SMDATSMBusdataJTAG3TDI7GNDGroundJTAG4TDO8+3.3v+3.3voltpowerJTAG5TMS9JTAG1+TRST#+3.3v+3.3voltpower103.3Vaux3.3vvoltpower+3.3v+3.3voltpower11WAKE#LinkReactivationPWRGDPowerGoodMechanicalKeycard12RSVDReservedGNDGround13GNDGroundREFCLK+ReferenceClockDifferentialpair14HSOp(0)TransmitterLane0,REFCLK-

15HSOn(0)DifferentialpairGNDGround16GNDGroundHSIp(0)ReceiverLane0,Differentialpair17PRSNT#2HotplugdetectHSIn(0)18GNDGroundGNDGround19HSOp(1)TransmitterLane1,DifferentialpairRSVDReserved20HSOn(1)GNDGround21GNDGroundHSIp(1)ReceiverLane1,Differentialpair22GNDGroundHSIn(1)23HSOp(2)TransmitterLane2,DifferentialpairGNDGround24HSOn(2)GNDGround25GNDGroundHSIp(2)ReceiverLane2,Differentialpair26GNDGroundHSIn(2)27HSOp(3)TransmitterLane3,DifferentialpairGNDGround28HSOn(3)GNDGround29GNDGroundHSIp(3)ReceiverLane3,

30RSVDReservedHSIn(3)Differentialpair31PRSNT#2HotplugdetectGNDGround32GNDGroundRSVDReserved33HSOp(4)TransmitterLane4,DifferentialpairRSVDReserved34HSOn(4)GNDGround35GNDGroundHSIp(4)ReceiverLane4,Differentialpair36GNDGroundHSIn(4)37HSOp(5)TransmitterLane5,DifferentialpairGNDGround38HSOn(5)GNDGround39GNDGroundHSIp(5)ReceiverLane5,Differentialpair40GNDGroundHSIn(5)41HSOp(6)TransmitterLane6,DifferentialpairGNDGround42HSOn(6)GNDGround43GNDGroundHSIp(6)ReceiverLane6,Differentialpair44GNDGroundHSIn(6)

45HSOp(7)TransmitterLane7,GNDGround46HSOn(7)DifferentialpairGNDGround47GNDGroundHSIp(7)ReceiverLane7,48PRSNT#2HotplugdetectHSIn(7)Differentialpair49GNDGroundGNDGroundPCI-Express16xConnectorPin-OutAl AH2PinSideBConnectorSideAConnector#NameDescriptionNameDescription1+12v+12voltpowerPRSNT#1Hotplugpresencedetect2+12v+12voltpower+12v+12voltpower3+12v+12voltpower+12v+12voltpower4GNDGroundGNDGround5SMCLKSMBusclockJTAG2TCK6SMDATSMBusdataJTAG3TDI7GNDGroundJTAG4TDO8+3.3v+3.3voltpowerJTAG5TMS9JTAG1+TRST#+3.3v+3.3voltpower103.3Vaux3.3vvoltpower+3.3v+3.3voltpower

11WAKE#LinkReactivationPWRGDPowerGoodMechanicalKey12RSVDReservedGNDGround13GNDGroundREFCLK+ReferenceClockDifferentialpair14HSOp(0)TransmitterLane0,DifferentialpairREFCLK-15HSOn(0)GNDGround16GNDGroundHSIp(0)ReceiverLane0,Differentialpair17PRSNT#2HotplugdetectHSIn(0)18GNDGroundGNDGround19HSOp(1)TransmitterLane1,DifferentialpairRSVDReserved20HSOn(1)GNDGround21GNDGroundHSIp(1)ReceiverLane1,Differentialpair22GNDGroundHSIn(1)23HSOp(2)TransmitterLane2,DifferentialpairGNDGround24HSOn(2)GNDGround25GNDGroundHSIp(2)ReceiverLane2,Differentialpair26GNDGroundHSIn(2)27HSOp(3)TransmitterLane3,DifferentialpairGNDGround28HSOn(3)GNDGround29GNDGroundHSIp(3)ReceiverLane3,Differentialpair30RSVDReservedHSIn(3)31PRSNT#2HotplugdetectGNDGround32GNDGroundRSVDReserved

33HSOp(4)TransmitterLane4,RSVDReserved34HSOn(4)DifferentialpairGNDGround35GNDGroundHSIp(4)ReceiverLane4,36GNDGroundHSIn(4)Differentialpair37HSOp(5)TransmitterLane5,GNDGround38HSOn(5)DifferentialpairGNDGround39GNDGroundHSIp(5)ReceiverLane5,40GNDGroundHSIn(5)Differentialpair41HSOp(6)TransmitterLane6,GNDGround42HSOn(6)DifferentialpairGNDGround43GNDGroundHSIp(6)ReceiverLane6,44GNDGroundHSIn(6)Differentialpair45HSOp(7)TransmitterLane7,GNDGround46HSOn(7)DifferentialpairGNDGround47GNDGroundHSIp(7)ReceiverLane7,48PRSNT#2HotplugdetectHSIn(7)Differentialpair49GNDGroundGNDGround50HSOp(8)TransmitterLane8,RSVDReserved51HSOn(8)DifferentialpairGNDGround52GNDGroundHSIp(8)ReceiverLane8,53GNDGroundHSIn(8)Differentialpair54HSOp(9)TransmitterLane9,GNDGround55HSOn(9)DifferentialpairGNDGround

56GNDGroundHSIp(9)ReceiverLane9,Differentialpair57GNDGroundHSIn(9)58HSOp(10)TransmitterLane10,DifferentialpairGNDGround59HSOn(10)GNDGround60GNDGroundHSIp(10)ReceiverLane10,Differentialpair61GNDGroundHSIn(10)62HSOp(11)TransmitterLane11,DifferentialpairGNDGround63HSOn(11)GNDGround64GNDGroundHSIp(11)ReceiverLane11,Differentialpair65GNDGroundHSIn(11)66HSOp(12)TransmitterLane12,DifferentialpairGNDGround67HSOn(12)GNDGround68GNDGroundHSIp(12)ReceiverLane12,Differentialpair69GNDGroundHSIn(12)70HSOp(13)TransmitterLane13,DifferentialpairGNDGround71HSOn(13)GNDGround72GNDGroundHSIp(13)ReceiverLane13,Differentialpair73GNDGroundHSIn(13)74HSOp(14)TransmitterLane14,DifferentialpairGNDGround75HSOn(14)GNDGround76GNDGroundHSIp(14)ReceiverLane14,Differentialpair77GNDGroundHSIn(14)78HSOp(15)TransmitterLane15,GNDGround79HSOn(15)DifferentialpairGNDGround80GNDGroundHSIp(15)ReceiverLane15,Differentialpair81PRSNT#2HotplugpresentdetectHSIn(15)82RSVD#2HotPlugDetectGNDGroundPRSNT#1isconnectedtoGNDonmotherboard.AddoncardneedstohavePRSNT#1connectedtooneofPRSNT#2dependingwhattypeofconnectorisinuse.PCI-expressstandardsPCIExpress1.0aIn2003,PCI-SIGintroducedPCIe1.0a,withaper-lanedatarateof250MB/sandatransferrateof2.5gigatransferspersecond(GT/s).Transferrateisexpressedintransferspersecondinsteadofbitspersecondbecausethenumberoftransfersincludestheoverheadbits,whichdonotprovideadditionalthroughput;PCIe1.xusesan8b/10bencodingscheme,resultingina20%(=2/10)overheadontherawchannelbandwidth.PCIExpress2.0PCI-SIGannouncedtheavailabilityofthePCIExpressBase2.0specificationon15January2007.ThePCIe2.0standarddoublesthetransferratecomparedwithPCIe1.0to5GT/sandtheper-lanethroughputrisesfrom250MB/sto500MB/s.Consequently,a32-lanePCIeconnector(x32)cansupportanaggregatethroughputofupto16GB/s.PCIe2.0motherboardslotsarefullybackwardcompatiblewithPCIev1.xcards.PCIe2.0cardsarealsogenerallybackwardcompatiblewithPCIe1.xmotherboards,usingtheavailablebandwidthofPCIExpress1.1.Overall,graphiccardsormotherboardsdesignedforv2.0willworkwiththeotherbeingv1.1orv1.0a.Like1.x,PCIe2.0usesan8b/10bencodingscheme,thereforedelivering,per-lane,aneffective4Gbit/smaxtransferratefromits5GT/srawdatarate.PCIExpress2.1PCIExpress2.1(datedMarch4,2009)supportsalargeproportionofthemanagement,support,andtroubleshootingsystemsplannedforfullimplementationinPCIExpress3.0.However,thespeedisthesameasPCIExpress2.0.TheincreaseinpowerfromtheslotbreaksbackwardcompatibilitybetweenPCIExpress2.1cardsandsomeoldermotherboardswith1.0/1.0a,butmostmotherboardswithPCIExpress1.1connectorsareprovidedwithaBIOSupdatebytheirmanufacturersthroughutilitiestosupportbackwardcompatibilityofcardswithPCIe2.1.PCIExpress3.0PCIExpress3.0specificationwasmadeavailableinNovember2010.NewfeaturesforthePCIExpress3.0specificationincl