USB-Type-C-Design-Guide@-Intel

CDI/IBP#:543611IntelConfidential267USBType-CDesignGuide18USBType-CDesignGuide18.1USBType-COverviewUSBType-Cisanewcable&connectorspecificationdefinedbyUSB-IF.Theconnectorisdefinedsothatitiscapableofsupportingultrathinformfactorwithzheightaslowas3mmandalsoenhanceduserexperiencebyallowingtheUSBType-Cplugtobepluggedintoareceptacleeitherrightsideuporupsidedown.RefertothefollowingfigureforthedetailedpinmapofaUSBType-Creceptacle.USBType-Cconnectorconsistsof24signalpinsdesignedinasymmetricalway.PleaserefertoTable18-1foradescriptionofallthesignalsonaUSBType-Cconnector.Thereareupto6differentialpairsavailableonaUSBType-Cconnector,with4highspeeddifferentpairsand2lowspeedpairs.Thereare2configurationchannelsignals(CC1/CC2)ontheconnectorwhichisusedfor:•Devicedetection•Orientationdetection•EstablishDFPandUFProles•Discoverandconfigurepower•Discoverandconfigureoptionalalternate/accessorymodesUnusedCCpinwillbereconfiguredasVconn,whichisusedtopowertheactivecable.Figure18-1.USBType-CReceptaclePinMapUSBType-CDesignGuide268IntelConfidentialCDI/IBP#:543611Withtwoconfigurationchannelsignalsforcommunication,USBType-CconnectorcansupportnotonlyUSBinterfacesbutalsoanyothervendorspecificinterfacelikeDisplayPort*,AudioandsuchinAlternateMode.InAlternateMode,boththehighspeedandlowspeedlinkandtheboththeSBU1/2pinscanbereconfiguredtosupporttheintendedconfiguration.Seefigurebelowforanexampleofthepinre-configurationtosupportaUSB+DPx2configuration.Figure18-2.AnatomyofaUSBType-CReceptacleGNDRX2+RX2-VBUSSBU1D-D+CC1VBUSTX1-TX1+GNDGNDTX2+TX2-VBUSCC2D+D-SBU2VBUSRX1-RX1+GNDA1A2A3A4A5A6A7A8A9A10A11A12B12B11B10B9B8B7B6B5B4B3B2B1HighSpeedLink1HighSpeedLink2LowSpeedLinkx2Figure18-3.USBType-CConnectorPinMapforaUSB+DPx2AlternateModeExampleTable18-1.USBType-CSignals(Sheet1of2)GroupSignalNameDescriptionPowerVBUSVBUS,capableofupto5A@20VwithUSBPDVCO[e-mail]DifferentialTX1+FirstHSDiffTXpairTX1-RX1+FirstHSDiffRXpairRX1-TX2+SecondHSDiffTXpairTX2-RX2+SecondHSDiffRXpairRX2-GNDDPML0+DPML0-VBUSDPAUX+USBD-USBD+CC1VBUSUSBTX-USBTX+GNDGNDDPML1+DPML1-VBUSCC2USB+USBD-DPAUX-VBUSUSBRX-USBRX+GNDA1A2A3A4A5A6A7A8A9A10A11A12B12B11B10B9B8B7B6B5B4B3B2B1CDI/IBP#:543611IntelConfidential269USBType-CDesignGuide18.2SupportedConfigurationSkylakeplatformsupportUSBType-Cimplementationwithadditionaldiscretecomponents.USBType-CportcanbeconfiguredtosupportAlternateModesasperthespecificationsuchasDisplayPort*andAnalogAudioAdaptoraccessorybyreconfiguringtheconnectorpins.TheSkylakeplatformreferencecollateralprovidesampleimplementationofvariousconfigurationoptionsthattheUSBType-CspecificationoffersincludingUSB2.0/3.0andAlternateModessuchasDisplayPort*andanalogAudio.RefertotablebelowforthesupportedconfigurationbeingenabledfortheSkylakeplatform.18.2.1USBOnlyConfigurationUSBType-CcanbeconfiguredtosupportUSBsignalsonly(LS,FS,HS,SS)withaminimumrequirementofUSB2.0(LS,FS,HS)support.BelowaretheoptionsavailableforimplementingaUSBonlyUSBType-CconnectorwithdiscretecomponentsonaSkylakeplatform.•USB2.0OnlyLowSpeedDifferentialD+LowSpeedDifferentialPair,primaryforUSB2connectionD-ControlCC1ConfigurationChannel1.Usedfordevicedetection,orientationdetectionandAlternateModeconfiguration.UnconnectedpinswillbereconfiguredtoVconn.CC2ConfigurationChannel2.Usedfordevicedetection,orientationdetectionandAlternateModeconfiguration.UnconnectedpinswillbereconfiguredtoVconnSidebandSBU1SidebandUsesignals.SBU2Table18-1.USBType-CSignals(Sheet2of2)GroupSignalNameDescriptionTable18-2.USBType-CSupportedHighSpeedConfigurationonSkylakeInterface1Interface2Interface3DescriptionUSB3.0SSUSBonlywithnoAlternateModeUSB3.0SSDP*x2USBwithDPforDPpanelsupport.USB3.0SSandDPx2canbeactiveconcurrently.USB3.0SSDP*x4USBwithDPforDPpanelsupportwithhigherresolution.DPx4andUSB3.0SScannotexistconcurrently.WhenDPx4isactiveonlyUSB2.0signalisavailable.Table18-3.USBType-CSupportedLowSpeedConfigurationonSkylakeInterface1Interface2Interface3DescriptionUSBUSB2OnlyUSBAnalogAudioUSB2muxedwithAnalogAudioUSBType-CDesignGuide270IntelConfidentialCDI/IBP#:543611•USB3.0withDualRolesupport•USB3.0withnoDualRolesupportNote:Thefigureaboveisahighlevelexampleimplementationblock,actualimplementationonschematicmayvary.USB2.0istheminimumrequirementforimplementingaUSBType-Cconnector.ThisconfigurationisachievedbyconnectingapairofUSB2.0signaltoDP+/DP-pinsonthereceptacleandshortingthe2DP+/DP-onthereceptacletogether.USBDualRolemodeissupportedifitisconnectedtoUSB2.0port0whichhastheDualRolesupport.CC1/CC2isnolongerrequiredtohandleplugorientationdetectioninthisconfigurationasthereisnoswitchingneeded.HoweverdiscreteCClogicisstillneededforhandlingUFP/DFPdetection,VconnswitchingandVBUScontrol.ESDprotectiondevicesisrequiredforallsignalconnectingtoSkylakedirectly.Forsignalsthatisconnectedto3rdpartycomponentlikeMUX/controller,pleasereferto3rdPartycomponentspecificationtodecideifplatformlevelESDdeviceisneeded.CMCmayberequiredtopassEMItestthereforeaCM