IBISTrainingClassEEsofEDAIBISTrainingClassAgilentRestrictedPage1February21,2007PDF文件使用"pdfFactoryPro"试用版本创建www.fineprint.cnOverviewPart1-IntroductionBackgroundSolutionOverviewIBISFileHierarchyPart2–IBISComponentsComponent-ModelTypeMappingsIBISPaletteComponentDialogsIBISTrainingClassAgilentRestrictedPage2February21,2007PDF文件使用"pdfFactoryPro"试用版本创建www.fineprint.cnBackgroundI/OBufferInterconnectSpecification(IBIS)modelsareacriticalrequirementforhigh-speeddigitaldesign.AnIBISmodelrepresentsthedriverandreceiverportionsofanintegratedcircuit(IC)intheformofadata-basedbehavioralmodel,whichprotectsintellectualproperty.VendorsdescribethesemodelsinafilethatisformattedtothestandardIBISspecification.Newversionsofthespecificationarereleasedevery2-3years.TheIBISOpenForum,whichgovernsthespecification,alsoprovidesaparserforeachnewIBISversion.DigitaldesignengineersneedtobeabletoeasilyandreliablyuseIBISmodelswhendesigningaprintedcircuitboard(PCB).TheyneedaccesstoIBIStechnologythatiscompliantwiththecurrentstandardandaccurateinitssimulationresults.IBISTrainingClassAgilentRestrictedPage3February21,2007PDF文件使用"pdfFactoryPro"试用版本创建www.fineprint.cnIBISFileHierarchy(Abridged)[Component]DefinesasingleIBIS|--[Package]‘component’containing1or|--[Pin]Listseachavailablepin.Apinistiedto1ormoremodels.morepin-modelcombinationsthatareusedtocreateaPCB.|--[PinMapping]|--[DiffPin]ThisisNOTthesameasanADScomponent’spin.ThisisNOTthesameasanADS‘component.’[ModelSelector]Definesallthepinpairsthatareina[Model]differentialconfiguration.|--[DriverSchedule]|--[VoltageRange]|--[PullupReference]Usedwhenapinhasmultiplemodelsavailable.|--[PulldownReference]|--[POWERClampReference]|--[GNDClampReference]|--[TTgnd]|--[TTpower]|--[Pulldown]Definesthebehavioraldataforaparticularmodel.|--[Pullup]|--[GNDClamp]Eachmodelhasatype,apolarity,|--[POWERClamp]andanenableswitch.|--[Rgnd]|--[Rpower]|--[Rac]|--[Cac]|--[Ramp]|--[RisingWaveform]|--[Fall