VESA VSIS标准.pdf
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VESA VSIS标准.pdf
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VESAVSISStandardVideoElectronicsStandardsAssociation920HillviewCourt,Suite140Phone:
408-957-9270Milpitas,CA95035Fax:
408-957-9277VideoSignalStandard(VSIS)Version1,Rev.2December12,2002PurposeToestablishthestandardanalogvideosignalcharacteristicsfortodaysgraphicscardsanddisplaymonitors.SummaryTodate,thegraphicscontrolleroutputsignalsthatdrivethedisplaymonitorhavenotbeenwelldefined.HandVsyncsignalsaredefinedonlyasTTL.Thedisplaysidehasthesameproblem,aseachdesignmayhavebeenoptimizedtocorrectforcertainsignaldeficienciesfromparticulargraphicscontrollers.Thisdocumentwilllaythegroundworkthatbothgraphicscontrollerandmonitordesignerscanusetoachievecompatibledesigns.VESAVideoSignalStandardVer.1,Rev2Copyright1999-2002VideoElectronicsStandardsAssociationPage1of22IntellectualPropertyCopyright1999-2002-VideoElectronicsStandardsAssociation.Allrightsreserved.Whileeveryprecautionhasbeentakeninthepreparationofthisstandard,theVideoElectronicsStandardsAssociationanditscontributorsassumenoresponsibilityforerrorsoromissions,andmakenowarranties,expressedorimplied,offunctionalityorsuitabilityforanypurpose.TrademarksAlltrademarksusedwithinthisdocumentarethepropertyoftheirrespectiveowners.VESAisatrademarkoftheVideoElectronicsStandardsAssociation.PatentsVESAproposalsandstandardsdocumentsareadoptedbytheVideoElectronicsStandardsAssociationwithoutregardastowhethertheiradoptionmayinvolvepatentsorarticles,materials,orprocesses.Suchadoptiondoesnotassumeanyliabilitytoanypatentowner,nordoesitassumeanyobligationwhatsoevertopartiesadoptingtheproposalorstandardsdocuments.SupportforthisStandardClarificationsandapplicationnotestosupportthisstandardmaybewritten.Toobtainthelateststandardandanysupportdocumentation,contactVESA.IfyouhaveaproductthatincorporatestheVideoSignalStandard,youshouldaskthecompanythatmanufacturedyourproductforassistance.Ifyouareamanufacturer,VESAcanassistyouwithclarification.AllcommentsorreportederrorsshouldbesubmittedinwritingtoVESAusingoneofthefollowingmethods:
Fax:
408-957-9277directthisnotetoTechnicalSupportatVESAEmail:
supportvesa.orgMailto:
TechnicalSupportVideoElectronicsStandardsAssociation920HillviewCourt,Suite140Milpitas,CA95035VESAVideoSignalStandardVer.1,Rev2Copyright1999-2002VideoElectronicsStandardsAssociationPage2of22RevisionHistoryVersion1.0-September1999InitialreleaseofthestandardVersion1,Rev.1-March2000Documentrevisedthroughout,forwasconditionseepreviousrelease.Version1,Rev.2December2002Revisedcopyrightdate,redefinedSyncsignaltestingSection2.4,replacedFigure1toimproveclarity.RevisedTable2,ChangedMaxLuminanceVoltagetoleranceto+0.070/-0.035;toTable3,addedNote1.RevisedAcknowledgementListtorecognizeinputfromothersources.AddedAppendixBreferencingtestsfromFPDM2.VESAVideoSignalStandardVer.1,Rev2Copyright1999-2002VideoElectronicsStandardsAssociationPage3of22AcknowledgmentsTheVESAVideoSignalStandardistheresultofexpertinputfrommanysources.VESAacknowledgesandthankstheDisplayCommitteememberswhocontributedtoandcombinedtheindustryexpertisethatresultedinthisstandard.Inparticularthefollowingindividualsandtheircompaniescontributedsignificanttimeandeffort.NameCompanyNameCompanyDellComputerCorp.MichaelH.BrillNIDLJohnRobertsNISTBillMilford3DfxAndersFriskNokiaDickCappelsAppleComputerKeitaKitahamaNvidiaDavidGlenATITechnologiesRossJatouNvidiaKristinaAuATITechnologiesHansvanderVenPanasonicRayChauATITechnologiesGeorgeWileyQualcommWarrenWhaleyCanonInformationEricRuetzS3SystemsMadanVenugopalS3JimWebbGenesisMicrochipIanMillerSamsungBobMyersHewlett-PackardJayLewSamsungDavidLeaverIBMKathyTseSonyElectronicsHiroakiYasudaIBMYoshihisaNaruiSonyElectronicsShaunKeriganIBMJoeMiseliSunMicrosystemsJackHosekNEC-MitsubishiDonChambersTotalTechnologiesDavidR.PattersonNIDLAlaindHautecourtViewSonicJoeGoodart,WorkgroupLeaderVESAVideoSignalStandardVer.1,Rev2Copyright1999-2002VideoElectronicsStandardsAssociationPage4of22TABLEOFCONTENTS1.INTRODUCTION.61.1COMPLIANCEWITHSTANDARD.61.2RELATEDVESADOCUMENTS.62.VESAVIDEOSIGNALDEFINITION.72.1SYNCHRONIZATION(HSYNCANDVSYNC)SIGNALSPECIFICATION.72.2ANALOGVIDEOOUTPUTS.82.3TESTCIRCUITS.92.4DEFINITIONOFTERMS.122.5JITTERMEASUREMENTDEFINITION.132.6GLOSSARYOFTERMS.132.7REFERENCES.143.APPENDIXA-WAVEFORMDIAGRAMS.154.APPENDIXBSUGGESTIONSFORTESTS.18ListofFiguresFigure1-HVSyncDriverdiagram.10Figure2-Videoterminatedmeasurementfixture.11Figure3-VideoSignalDefinitions.12Figure4-JitterMeasurementDefinition.13Figure5-PulseDefinitions,general.15Figure6-PeriodicJitter(positiveactivepulseshown).16Figure7-VoltageRippleandNoise.17VESAVideoSignalStandardVer.1,Rev2Copyright1999-2002VideoElectronicsStandardsAssociationPage5of221.IntroductionDisplaygraphicscontrollertechnologyhasleaptforwardinthelast10yearsatabreak-neckpace.DisplayshavegonefromVGAto1600x120085Hzandbeyond.Graphicscontrollershaveincreasedperformanceuptofast3Dimagerywith32-bitpixeldepth.However,thesignalpathbetweenthegraphicscontrolleranddisplaymonitorhasremainedthesameformorethan10years.WithnewgraphicsASICsrunningat2.5volts,thereisnolongeranymarginleftintheTTLsynchronizationcircuits.Withcurrenthighbandwidthdesigns,displaysignalshavelittlemarginleft,resultinginmonitorjitterandpoorfrontofscreendefinition.Consequently,therehaveoftenbeenlastminutepatchesbybothdisplayvendorsandgraphicscardcompaniesjusttogetproductstowork.Thisdocumentwillgivemonitor/graphicsvendorsastartingpointfromwhichtoaddresstheseissues.Byusingthesespecificationsasaguideline,industrydesignerswillbeabletomastertheartofgoodsignalintegrity.Thiswillbenefittheindustryasawhole,aswellastheenduser.1.1CompliancewithstandardIfasupplierdoesnotwishtospecifycompliancewiththestandardattheminimumpixelclockperiod,thenthesuppliermayalternativelyspecifyalongerpixelclockperiod.1.2RelatedVESAdocumentsVESADisplaySpecificationsandTestProcedures(DSTP)Version1.0Rev1.0-Oct.3,1996VESADisplayDataChannelStandard(DDC)Version3-Dec.15,1997VESAEnhancedDisplayDataChannelStandard(E-DDC)Version1.0-Sept.2,1999VESAFlatPanelDisplayMeasurementsStandard,Version2.0June1,2001VESAVideoSignalStandardVer.1,Rev2Copyright1999-2002VideoElectronicsStandardsAssociationPage6of222.VESAVideoSignalDefinition2.1Synchronization(HsyncandVsync)SignalSpecificationAllmeasurementsaremadeattheinterfacebetweentheSystemUnitconnectorandSignalCableconnectortotheDisplayDevice,unlessotherwisenoted;thisincludesadaptercablesifshippedwiththegraphicscard.SeeFigure1forSyncterminations.MinMaxDriverLogicLevel“1”2.4Volts5.5VoltsDriverLogicLevel“0”0.0Volts0.5VoltsDriverHighLevelOutputCurrent8maDriverLowLevelOutputCurrent8maReceiverLogicLevel“1”2.0VoltsReceiverLogicLevel“0”0.8VoltsFallTimeMax80%ofminimumpixelclockperiodRiseTimeMax80%ofminimumpixelclockperiodMonotonicRise/FallVoltagerange0.5-2.4VoltsOvershoot/Undershoot30%ofhighlevelsignalvoltagerangeNosignalexcursionsallowedinthe0.5-2.4voltvoltagerangeJitter(MeasuredbetweenHsyncpulses).Overthefrequencyspectrum:
OnehalfofthedifferencebetweenthemaximumandminimumintervalbetweenHsyncpulsesmeasuredover100,000intervalsshallbelessthan15%ofthepixelclock,0Hztomax.horizontalrefreshrateatallimageformats,worst-casescreenpatterns.(alsorefertoSection2.5JitterDefinition)Table2-1-SyncVoltageLevelsThisspecificationusesTTLvoltageleveltransitionsforcompatibility.NeverusedevicesthattriggeratCMOSlevels.WedonotuseTTLsource/sinkcurrents.UseonlyCMOSdevicesthathavebeendesignedforTTLvoltagetriggerlevelsandhavesymmetricaldrivecurrentsofatleasttheminimumstatedinthisspecification.SeeSection2.4video/waveformforsignaldefinitions.VESAVideoSignalStandardVer.1,Rev2Copyright1999-2002VideoElectronicsStandardsAssociationPage7of222.2AnalogVideoOutputsAllmeasurementsaremadeattheinterfacebetweentheSystemUnitconnectorandSignalCableconnectortotheDisplayDevice,unlessotherwisenoted;thisincludespigtailadaptersifshippedwiththegraphicscard.SeeFigure2forRGBterminations.ValueCommentMaxLuminanceVoltageInputData=(FFh)0.700Volts+0.070/-0.035voltsDCMeasurement.Seenote(a)and(d).MinLuminancevoltageInputData=(00h)0.000VoltsDCMeasurement.Seenote(a)and(d).VideoChannelRise/FallTimeMax25%ofminimumpixelclockperiodSeenotes(b),(e)and(g).MaximumSettlingTimeafterovershoot/undershoot30%ofminimumpixelclockperiodaveragedover100waveformsto5%finalfull-scalevalue.Seenotes(b).MonotonicYesDefinitioninsection2.6Resolution1LSBIntegralLinearityError+/-1LSBDefinitioninsection2.6DifferentialLinearityError+/-1LSBDefinitioninsection2.6VideoChanneltoVideoChannelMismatch6%ofanyvideooutputvoltageoverthefullvoltagerangeSeenotes(f).VideoNoiseinjectionratio+/-2.5%ofMaxLuminanceVoltageSeenote(c)and(e).VideoChanneltoVideoChannelOutputSkew50%ofminimumpixelclockperiodSeenotes(f).Overshoot/Undershoot+/-12%ofstepfunctionvoltageleveloverthefullvoltagerange1.5XtherisetimeorfalltimedurationTable2-2a)WithrespecttoAnalogChannelRTNpinintheconnector,whereAnalogChannelRTNdenotesthe
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