用于自动驾驶的MIPI传感器解决方案

11on•Sensorsty•Summary22•AutoindustryisbeingtransformedbyglobaltrendsectricvehiclesTightersafety•Automotiveindustryisnowleveragingthemobilesmartphonetechnologyancececommands33Market•Camera,LightDetectionandRanging,RadarandUltrasoundElectromagneticSpectrum•Carscanbeexpectedtohave8-12ElectromagneticSpectrum*44oughputLatencyoughputLatency•Predictable(nobuffering)55SISpecificationVersionv1SISpecificationVersionv1.1v1.2v1.3v2.0v2.1v3.0rameusingshortframesyncpacketslongdatastonevirtualchannelandaMIPIPHYv1.1v1.2v1.2v2.1v2.1v2.5v1.0v1.2v1.2v2.0nesperDorCPHYseriallink4ricuserdefinedlongpacketsdatatypesataTypesLongPacketDataTypesAdditionalRAWpixeldatatypes16,2016,2016,20,24Genericuser-defined,longpackets(4datatypes)DPCMcompression10-{8,6,7}-10and12-{8,7,6}-12DPCMcompression12-10-12VirtualchannelanddatatypelongpacketinterleavingMaximumnumberofvirtualchannels(D-/C-PHY)4/-4/-4/416/3216/3216/32LatencyReductionandTransportEfficiency(LRTE)LRTEwithEnd-of-Transmissionshortpackets(EoTp)LongpacketdatascramblingSmartRegionofInterest(SROI)SerialLinkUSL77ceHYvhPHYvidth88•MinimalOverhead•EnhancedPPALatestFeatures•ALPmodeAreasavingsduetoiedHSRX99CustomerUseCase:GEOGW5ADASVision•ADASusesCSI-2ascommunicationlinkbetweenthesensorsandCVPIr•GEOGW3andGEOGW4usedMixelMIPID-PHYwithRambusCSI-2controllernr•Scalableperformance•Optimizedgateandmemoryfootprint•Optimizedbandwidthmatchingfeaturesgrammableetcapable•CSI-2v3.0support•Licensedinover300CSI-2/DSI-2since2010SerDesControllerSoCFabricInterconnect(e.g.,NOC/AXIbus)•LatestspecificationadditionsenablenewperspectivesSensorSensorSubsystemSubsystemSensorSensorSubsystemSubsystemSubsystem/GPUSerDesControllerSoCFabricInterconnect(e.g.,NOC/AXIbus)fromPHYCSI2TXntrollerui_clkclkCSITXUserFIFOclkclkndCommandfromPHYCSI2TXntrollerui_clkclkCSITXUserFIFOclkclkndCommandAckCommandAcklReadEnableEnable•MainpurposeistohandlecaseswheretheUserApplicationclockdoesnotmatchtheCSI-2TxControllerClock.•TheUserFIFOalsohandlescasesofpixelbandwidthdifferences.(16pixelsperclockintoFIFO,8pixelsperclockout).•TheUserFIFOmustbelargeenoughtopreventanygapsorstallsinMIPIdataduring•TheUserApplicationinterfacesendspacketrequestsindicatingtypeandpixelcount.OncetheUserFIFOacknowledgesthepacketrequest,pixelreadenablerequestspixeldatauntilpixelcountisreached.eClockeClockApplicationudertualChannel•IfMIPIbandwidthislessthanUserFIFOinputbandwidth,thenclockcanbeslowerthanMIPIexampleztemClockckfromfromPHYCSITXntrollerApplicationclkcCSITXntrollerApplicationclkclkdCSI-2TXUserFIFOommandAckommandAckterfacetoPHY4*8bits/lanenablenable32bits/cyclebitwidebitwide44onalSafetyStandardASIL-CtoDingnhstCustomerUseCase:Renesas(IDT)AutomotiveSoC•Multi-channelsensorinterfacew/parallelchannelacquisitionCSITxLaneDPHY@2.5GBs/lanefetyRequirementsCQAutogradesupportingTjCrollersSafetyManual•FMEDA•DFMEA•CertificationhandledbySGS-TUEVdySafetyBISTForAutonomousDriving•Concentratesonfaultdetectionmechanisms•TestsECC,CRC,parityandothersafetymechanismsonpowerup•Canbetriggedbysystemsoftware/firmwareforperiodtestingduringoperation•Deepertestoferrordetectionmechanisms•AlwaysrunevenifBISTisnotdoneatahigherlevel•CreatesanearlyconfirmationthatIPisfunctional•Providesconfidencethatsafetymechanismsarefunctional•ProvidesaguaranteedlevelofsafetycoveragethatsystemBISTmaynotprovideBISTdoesnotreplaceSOCtesting:nschdogn•Parityprotectiononpixelsandpixelbuffers•MIPIprotocolheaderECCandpacketdataCRC•DataFormatting,PackingLogic,criticalstatemachines•Criticallogicblockscompareduplicateoutputsn•PacketnumberfieldinuserinterfaceFIFOstorespacketnumbers•Internalerrortriggeredonnonsequentialpacketnumbers•Area/PowerefficientwaytodetectfaultsthatstoptheControllerfrommakingforwardprogress•Followsasequenceofinputandoutputsignalsandchecksinternalsignals•IRQonerrorbacktothesystem•Supportsoftre