Transcription of Controller Area Network Physical Layer Requirements
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ApplicationReportSLLA270 (CAN),ISO11898:1993,isfindingwidespreadu seinbuildingautomation,processcontrol, , (bittimingrequirements).. ( ).. LayerData-LinkLayerLogic Link ControlMedium Access ControlPhysicalLayerPhysical SignalingPhysical Medium AttachmentMedium Dependant InterfaceEmbeddedCANC ontrollerCANT ransceiverCAN BusLine Electricalspecifications:transceivers,co nnectors, cable CANcontroller,embedded shighreliability, ,hardwareinterfacecards, :1993 StandardArchitectureFigure1displaystheIS O11898standardarchitectureusingthebottom twolayersoftheOSImodel, ,andaftersendingamessage, , sand0 sintoelectricalpulsesleavinganode, , , 1 CANNODE 2 CANNODE 3 RECEIVE-ONLYNODE Bytes DataCCRRCCACKEOFEOFEOFFISIIDDEErr00 DDLLCC11- bitI dentifierRTRSOF11- bitI dentifi erRTRIDEr 0D L C0 ..8C R CA C Kr 118-bitI dentifierSRRSOFB ytes , ,onlythosenodesrequiringupdateddataallow themessagetopassthroughafilterthatissetb ythenetworkdesigner ,messagesfromcertainnodescanpass, ,muchofanode's ,thatasystemdesignercanusetoidentifythec ontentofamessage, , , :29-BitIdentifierCAN' , , C wins arbitrationACK bitACK bitACK bitNODEANODEBNODECCANBus4 PhysicalLayerRequirementsPhysicalLayerRe quirementsAllnodesonabusparticipateineac hbit , , ,NodesBandCthenbeginarbitration ' , , ,whicharenormallytransparenttoasystemope rator,areincludedinanycontrollerthatimpl ementstheCANprotocolsuchastheTexa
Application Report SLLA270–January 2008 Controller Area Network Physical Layer Requirements Steve Corrigan..... ICP - Industrial Interface ABSTRACT The multipoint bus structure and robust protocol of the High-Speed Controller Area
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