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首页 SD Memory Card Specifications V1.01

SD Memory Card Specifications V1.01.pdf

SD Memory Card Specifications V…

dstxiyang
2011-09-19 0人阅读 0 0 0 暂无简介 举报

简介:本文档为《SD Memory Card Specifications V1.01pdf》,可适用于IT/计算机领域

SDMemoryCardSpecificationsPHYSICALLAYERSPECIFICATIONPartAprilSDGroupMatsushitaElectricIndustrialCo,Ltd(MEI)SanDiskCorporationToshibaCorporationVersion(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionRevisionHistoryDateVersionChangescomparedtopreviousissueMarchth,BaseversionAprilth,TheSupplementaryNote(June)thatincludesclarificationstothespecwasincorporatedintothespecReliabilityDurabilitytheopenissuesweredefined(TorqueBendingWPSwitchcycles)ESD:highervoltagesforNoncontactAirdischargeweredefinedCard’sThicknesstolerancewereredefinedforthecenterareaofthecardandmoreclarificationswereaddedtotheWPswitchdiagramThinSDCard:MechanicalDrawingwasaddedMoreclarificationswereaddedforSDReadOnlyCardsMaximumtimeoutforWriteErasewaschangedtomsUnderrunOverrunstatusbitswereremoved(nonrelevantinSDCard)fromTableTypofixesandsomeclarificationnotesUpdateFigStopTranduringCRCresponseatMultBlkWRAddSDROMCardtypeinSDSTATUSFixerrorinSENDCIDCSDNcrtimingAclarificationabouttheoperatingfrequencyrangewereadded(MzmandatoryforSDCard)MaxCurrentduringinitializationperiodwasredefinedInitializationsequenceinSPImodeforSDwasupdatedCopyright(C)(C)bySDGroup(MEI,SanDisk,Toshiba)Exemption:PublisherandCopyrightHolder:NonewillbeliableforanydamagefromuseofthisdocumentConditionsforpublication:SDGroup(MEI,SanDisk,Toshiba)(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionGeneraldescriptionSystemfeaturesSDMemoryCardSystemConceptBusTopologySDbusSPIbusBusProtocolSDbusSPIBusSDMemoryCardPinsandRegistersCompatibilitytoMultiMediaCardSDMemoryCardFunctionalDescriptionGeneralCardIdentificationModeCardResetOperatingVoltageRangeValidationCardIdentificationProcessDataTransferModeWideBusSelectionDeselectionDataReadDataWriteEraseWriteProtectManagementCardLockUnlockOperation(Optional)CopyrightProtectionApplicationspecificcommandsClockControlCyclicredundancycodes(CRC)ErrorConditionsCRCandIllegalCommandRead,WriteandEraseTimeoutConditionsCommandsCommandTypesCommandFormatCommandClasses(RedefinedforSDMemoryCard)DetailedCommandDescriptionCardStateTransitionTableResponsesSDMemoryCardStatusCardStatusSDStatusMemoryArrayPartitioning(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionTimingsCommandandResponseDataReadDataWriteTimingValuesCardRegistersOCRRegisterCIDRegisterCSDRegisterRCARegisterDSRRegister(Optional)SCRRegisterSDMemoryCardHardwareInterfaceHotinsertionandremovalCardDetection(InsertionRemoval)Powerprotection(InsertionRemoval)PowerupProgrammablecardoutputdriver(Optional)BusoperatingconditionsBussignallevelsBustimingLowVoltage(v)SDMemoryCards(Preliminary)SPIModeIntroductionSPIBusProtocolModeSelectionBusTransferProtectionDataReadDataWriteEraseWriteProtectManagementReadCIDCSDRegistersResetSequenceErrorConditionsMemoryArrayPartitioningCardLockunlockApplicationSpecificcommandsCopyrightProtectioncommandsSPIModeTransactionPacketsCommandTokensResponsesDataTokensDataErrorTokenClearingStatusBits(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionCardRegistersSPIBusTimingDiagramsCommandResponseDatareadDatawriteTimingValuesSPIElectricalInterfaceSPIBusOperatingConditionsBusTimingSDMemoryCardmechanicalspecificationCardpackageExternalsignalcontacts(ESC)DesignandformatReliabilityanddurabilityElectricalStaticDischarge(ESD)RequirementsQualityassuranceMechanicalformfactorSystem:cardandconnectorCardhotinsertionInverseinsertionCardOrientationThin(mm)SDMemoryCard(Preliminary)AppendixPowerSupplyDecouplingConnectorGeneralCardInsertionandRemovalCharacteristicsAbbreviationsandterms(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionGeneraldescriptionGeneraldescriptionSDMemoryCard(SecureDigitalMemoryCard)isamemorycardthatisspecificallydesignedtomeetthesecurity,capacity,performanceandenvironmentrequirementsinherentinnewlyemergingaudioandvideoconsumerelectronicdevicesTheSDMemoryCardwillincludeacopyrightprotectionmechanismthatcomplieswiththesecurityoftheSDMIstandardandwillbefasterandcapableforhigherMemorycapacityTheSDMemoryCardsecuritysystemusesmutualauthenticationanda"newcipheralgorithm"toprotectfromillegalusageofthecardcontentAnonesecuredaccesstotheuser‘sowncontentisalsoavailableThephysicalformfactor,pinassignmentanddatatransferprotocolareforwardcompatiblewiththeMultiMediaCardwithsomeadditionsTheSDMemoryCardcommunicationisbasedonanadvancedpininterface(Clock,Command,xDataandxPowerlines)designedtooperateinatmaximumoperatingfrequencyofMHzofandlowvoltagerangeThecommunicationprotocolisdefinedasapartofthisspecificationTheSDMemoryCardhostinterfacesupportsregularMultiMediaCardoperationaswellInotherwords,MultiMediaCardforwardcompatibilitywaskeptActuallythemaindifferencebetweenSDMemoryCardandMultiMediaCardistheinitializationprocessTheSDMemoryCardSpecificationsweredividedtoseveraldocumentsTheSDMemoryCarddocumentationstructureisgiveninFigureFigure:SDMemoryCardDocumentationStructure•SDMemoryCardAudioSpecification:Thisspecificationalongwithotherapplicationspecificationsdescribethespecificationofcertainapplication(inthiscaseAudioApplication)andtherequirementstoimplementit•SDMemoryCardFileSystemSpecification:DescribesthespecificationofthefileformatstructureofthedatasavedintheSDMemoryCard(inprotectedandunprotectedareas)•SDMemoryCardSecuritySpecification:Describesthecopyrightprotectionmechanismandtheapplicationspecificcommandsthatsupportit•SDMemoryCardPhysicalLayerSpecification(thisdocument):DescribesthephysicalinterfaceandthecommandprotocolusedbytheSDMemoryCardThepurposeoftheSDMemoryCardPhysicalLayerspecificationisthedefinitionoftheSDMemoryCard,itsenvironmentandhandlingThedocumentissplitupintoseveralportionsChaptergivesageneraloverviewofthesystemAudioSpecificationotherApplicationDocumentsFileSystemSpecificationSDMemoryCardPhysicalLayerSpec(ThisDocument)SDMemorySecurityCardSpec(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionGeneraldescriptionconceptsThecommonSDMemoryCardcharacteristicsaredescribedinChapterAsthisdescriptiondefinesanoverallsetofcardproperties,werecommendtousetheproductdocumentationinparallelThecardregistersaredescribedinChapterChapterdefinestheelectricalparametersoftheSDMemoryCard’shardwareinterfaceChapterdescribesthephysicalandmechanicalpropertiesoftheSDMemoryCardsandtheminimalrecommendationstothecardslotsorcartridgesAsusedinthisdocument,“shall”or“will”denotesamandatoryprovisionofthestandard“Should”denotesaprovisionthatisrecommendedbutnotmandatory“May”denotesafeaturewhosepresencedoesnotprecludecompliance,thatmayormaynotbepresentattheoptionoftheimplementor(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionSystemfeaturesSystemfeatures•Targetedforportableandstationaryapplications•Voltagerange:SDMemoryCardBasiccommunication(CMD,CMD,CMD,ACMD):VOthercommandsandmemoryaccess:VSDLVMemoryCard(lowvoltage)Operatingvoltagerange:V•Designedforreadonlyandreadwritecards•VariableclockrateMHZ•UptoMBytesecReadWriterate(usingparalleldatalines)•Maximumdataratewithuptocards•Correctionofmemoryfielderrors•Cardremovalduringreadoperationwillneverharmthecontent•ForwardcompatibilitytoMultiMediaCard•CopyrightsProtectionMechanismComplieswithhighestsecurityofSDMIstandard•PasswordProtectionofcards(option)•WriteProtectfeatureusingmechanicalswitch•Builtinwriteprotectionfeatures(permanentandtemporary)•CardDetection(InsertionRemoval)•Applicationspecificcommands•Comfortableerasemechanism•Protocolattributesofthecommunicationchannel:•SDMemoryCardthicknessisdefinedaseithermm(normal)andmm(ThinSDMemoryCard)SDMemoryCardCommunicationChannelSixwirecommunicationchannel(clock,command,datalines)ErrorprotecteddatatransferSingleorMultipleblockorienteddatatransfer(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionSDMemoryCardSystemConceptSDMemoryCardSystemConceptTheSDMemoryCardprovidesapplicationdesignerswithalowcostmassstoragedevice,implementedasaremovablecard,thatsupportshighsecuritylevelforcopyrightprotectionandacompact,easytoimplementinterfaceSDMemoryCardscanbegroupedintoseveralcardclasseswhichdifferinthefunctionstheyprovide(givenbythesubsetofSDMemoryCardsystemcommands):•ReadWrite(RW)cards(Flash,OneTimeProgrammableOTP,MultipleTimeProgrammableMTP)Thesecardsaretypicallysoldasblank(empty)mediaandareusedformassdatastorage,enduserrecordingofvideo,audioordigitalimages•ReadOnlyMemory(ROM)cardsThesecardsaremanufacturedwithafixeddatacontentTheyaretypicallyusedasadistributionmediaforsoftware,audio,videoetcIntermsofoperatingsupplyvoltage,twotypesofSDMemoryCardsaredefined:•SDMemoryCardswhichsupportsinitializationidentificationprocesswitharangeofvandoperatingvoltagewithinthisrangeasdefinedintheCSDregister•SDLVMemoryCardsLowVoltageSDMemoryCards,thatcanbeoperateinvoltagerangeofVTheSDLVMemoryCardswillbelabeleddifferentlythenSDMemoryCardsSDMemoryCardsystemincludestheSDMemoryCard(orseveralcards)thebusandtheirHostApplicationTheHostandApplicationspecificationisbeyondthescopeofthisdocumentThefollowingsectionsprovidesanoverviewofthecard,bustopologyandcommunicationprotocolsoftheSDMemoryCardsystemThecopyrightprotection(security)systemdescriptionisgivenin“SDMemoryCardSecuritySpecification”documentBusTopologyTheSDMemoryCardsystemdefinestwoalternativecommunicationprotocols:SDandSPIApplicationscanchooseeitheroneofmodesModeselectionistransparenttothehostThecardautomaticallydetectsthemodeoftheresetcommandandwillexpectallfurthercommunicationtobeinthesamecommunicationmodeTherefore,applicationswhichusesonlyonecommunicationmodedonothavetobeawareoftheother(c)(c)bySDGroup(MEI,SanDisk,Toshiba)Date:AprilSDMemoryCardSpecificationsPartPhysicalLayerSpecificationVersionSDMemoryCardSystemConceptSDbusFigure:SDMemoryCardsystembusTopologyTheSDbusincludesthefollowingsignals:CLK:HosttocardclocksignalCMD:BidirectionalCommandResponsesignalDATDAT:BidirectionaldatasignalsVDD,VSS,VSS:PowerandgroundsignalsTheSDMemoryCardbushasasinglemaster(application),multipleslaves(cards),synchronousstartopology(refertoFigure)Clock,powerandgroundsignalsarecommontoallcardsCommand(CMD)anddata(DATDAT)signalsarededicatedtoeachcardprovidingcontinuespointtopointconnectiontoallthecardsDuringinitializationprocesscommandsaresenttoeachcardindividually,allowingtheapplicationtodetectthecardsandassignlogicaladdressestothephysicalslotsDataisalwayssent(received)to(from)eachcardindividuallyHowever,inordertosimplythehandlingofthecardstack,aftertheinitializationprocess,allcommandsmaybesentconcurrentlytoallcardsAddressinginformationisprovidedinthecommandpacketSDbusallowsdynamicconfigurationofthenumberofdatalinesAfterpowerup,bydefault,theSDMemoryCardwilluseonlyDATfordatatransferAfterinitializationthehostcanchangethebuswidth(numberofactivedatalines)ThisfeatureallowseasytradeoffbetweenHWcostandsystemperformanceNotethatwhileDATDATarenotinuse,therelatedHost’sDATlinesshouldbeintristate(inputmode)SDMemoryCard(A)CLKVddVssDD,CMDSDMemoryCard(B)CLKVddVssDD,CMDMultiMediaCard(C)CLKVddVssD,CS,C

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