low-pin-count-protocol

Intel®LowPinCount(LPC)InterfaceSpecificationAugust2002Revision1.1DocumentNumber:251289-001RIntroductionR2251289-001InformationinthisdocumentisprovidedinconnectionwithIntel®products.Nolicense,expressorimplied,byestoppelorotherwise,toanyintellectualpropertyrightsisgrantedbythisdocument.ExceptasprovidedinIntel’sTermsandConditionsofSaleforsuchproducts,Intelassumesnoliabilitywhatsoever,andInteldisclaimsanyexpressorimpliedwarranty,relatingtosaleand/oruseofIntelproductsincludingliabilityorwarrantiesrelatingtofitnessforaparticularpurpose,merchantability,orinfringementofanypatent,copyrightorotherintellectualpropertyright.Intelproductsarenotintendedforuseinmedical,lifesaving,orlifesustainingapplications.Intelmaymakechangestospecificationsandproductdescriptionsatanytime,withoutnotice.Designersmustnotrelyontheabsenceorcharacteristicsofanyfeaturesorinstructionsmarkedreservedorundefined.Intelreservestheseforfuturedefinitionandshallhavenoresponsibilitywhatsoeverforconflictsorincompatibilitiesarisingfromfuturechangestothem.THISSPECIFICATIONISPROVIDEDASISWITHNOWARRANTIESWHATSOEVER,INCLUDINGANYWARRANTYOFMERCHANTABILITY,NON-INFRINGEMENT,FITNESSFORANYPARTICULARPURPOSE,ORANYWARRANTYOTHERWISEARISINGOUTOFANYPROPOSAL,SPECIFICATIONORSAMPLE.Inteldisclaimsallliability,includingliabilityforinfringementofanyproprietaryrights,relatingtouseofinformationinthisspecification.Nolicense,expressorimplied,byestoppelorotherwise,toanyintellectualpropertyrightsisgrantedherein,exceptthatalicenseisherebygrantedtocopyandreproducethisspecificationforinternaluseonly.Intelmayhavepatentsand/orpatentapplicationsrelatedtothevariousLowPinCountinterfacesdescribedintheLowPinCount(LPC)InterfaceSpecification,Revision1.1.Areciprocal,royalty-freelicensetotheelectricalinterfacesandbusprotocolsdescribedin,andrequiredby,theLowPinCount(LPC)InterfaceSpecification,Revision1.1isavailablefromIntel.ContactyourlocalIntelsalesofficeoryourdistributortoobtainthelatestspecificationsandbeforeplacingyourproductorder.Copiesofdocumentswhichhaveanorderingnumberandarereferencedinthisdocument,orotherIntelliterature,maybeobtainedfrom:IntelCorporation*Othernamesandbrandsmaybeclaimedasthepropertyofothers.Copyright©2002,IntelCorporationIntroductionR251289-0013Contents1Introduction........................................................................................................................71.1GoalsoftheLPCInterface(I/F)............................................................................71.2AssumptionsandFunctionalityRequirements......................................................71.3Terminology..........................................................................................................82SignalDefinition.................................................................................................................93BlockDiagram.................................................................................................................114ProtocolOverview...........................................................................................................134.1CycleTypes........................................................................................................134.2Memory,I/O,andDMACycleOverview.............................................................144.2.1LAD[3:0]...............................................................................................144.2.1.1START................................................................................154.2.1.2CycleType/Direction(CYCTYPE+DIR)..........................154.2.1.3SIZE...................................................................................164.2.1.4Turn-Around(TAR).............................................................164.2.1.5ADDR.................................................................................164.2.1.6CHANNEL..........................................................................164.2.1.7DATA..................................................................................164.2.1.8SYNC.................................................................................174.2.1.9SYNCTime-out..................................................................174.2.1.10SYNCErrorIndication........................................................184.2.1.11LFRAME#...........................................................................184.2.1.12StartofCycle......................................................................194.2.1.13AbortMechanism...............................................................204.3FirmwareMemoryCycleOverview.....................................................................214.3.1FieldDefinitions...................................................................................214.3.1.1START.....................................................................