标签: closure

AchievingDFTClosure-TheNextStepinDesignForTest(Synopsys)

【应用手册】AchievingTimingClosureinBasic(PMADirect)FunctionalModeThisapplicationnotedescribesthemethodtoachievetimingclosurefordesignsthatusetransceiversinBasic(PMADirect)modeinAltera’sStratix®IVGXorStratixIVGTFPGAs.ItalsodescribesbestpracticesfortheQuartus®IIsoftwareversion9.1SP1andearlierandbestpracticesfortheQuartusIIsoftwareversion9.1SP2andlater.ThisapplicationnotedescribestechniquesforresolvingtimingviolationsforpathsbetweenthetransceiverandtheFPGAcoreonly.YoumustfollowgeneralbestpracticesfortimingclosureinFPGAdesignstoresolveanytimingviolationsthatexistintheFPGAcore.AchievingTimingClosureinBasic(PMADirect)FunctionalModeAN-580-3.0ApplicationNoteThisapplicationnotedescribesthemethodtoachievetimingclosurefordesignsthatusetransceiversinBasic(PMADirect)modeinAltera’sStratixIVGXorStratixIVGTFPGAs.Italsodescribesbestpracticesfor……

【应用手册】AN584:TimingClosureMethodologyforAdvancedFPGADesignsToday’sdesignapplicationandperformancerequirementsaremorechallengingduetoincreasedcomplexity.Withtheevolutionofsystem-on-a-chipdesigns,designshavegrownlarger.Additionally,externalmemoryinterfacesandmixedsignaldevicesbringagreaterchallengetotimingclosure.Ifyouusethird-partyIPinyourdesigns,youmaynothavecontroloverhowtheseIPblocksarepipelined,orhowtheyarepartitioned.YourdesignmustaccommodatetimingrequirementsfortheIPusedinthesystemtoachieveafullyfunctionaldesign.Whenperformancerequirementsforanypartofadesignarenotcompletelymet,thesystemfailstofunctionasdesired.Thisapplicationnotefocusesonagenericmethodologyfortimingclosure.WhetheryouuseApplicationSpecificStandardProducts(ASSPs),ApplicationSpecificIntegratedCircuits(ASICs),orFieldProgrammableGateArrays(FPGAs),timingclosureposesachallengeforsystemdesign.TheQuartus®IIFitterdefaultsettingscanhelpyoumeetrequiredtimingconstraintsformostdesigns.However,forsomedesignsthatcannotmeettimingrequirementswithdefaultsettings,followthemethodologyinthisapplicationnotetoachievetimingclosurerequirements.Furthermore,theguidelinesandmethodologypresentedinthisdocumentcanhelpimproveproductivity,closetimingforyourdesignfaster,andreducethenumberofiterations.AN584:TimingClosureMethodologyforAdvancedFPGADesignsAugust2009AN-584-1.0IntroductionToday’sdesignapplicationandperformancerequirementsaremorechallengingduetoincreasedcomplexity.Withtheevolutionofsystem-on-a-chipdesigns,designshavegrownlarger.Additionally,externalmemoryinterfacesandmixedsignaldevicesbringagreaterchallengetotimingclosure.Ifyouusethird-partyIPinyourdesigns,youmaynothavecont……

【应用手册】AN545:DesignGuidelinesandTimingClosureTechniquesforHardCopyASICsThisapplicationnotecoverstopicsfromatimingclosureperspective,forthesuccessfulmigrationtoHardCopy®ASICsfromAltera’sFPGAs.Thefirstsectioncoversmetastability,synchronousandasynchronousresets,andsynchronizinganasynchronousreset.ThissectionalsodescribestechniquesforpassingcontrolanddatasignalsacrossclockdomainsusingahandshakemechanismandFIFO.Thenextsectioncoverstheconceptoftimingrequirementsatthesystemlevel(I/Oconstraints)anddescribesindetailwhatyoumustdotofullyandproperlyconstrainyourdesign(I/Oandinternaltimingconstraints).ThissectionfocusesontimingconstraintsbyintroducingafewbasiccommandsavailableintheTimeQuestTimingAnalyzerthatarethemostcriticalforanydesign.ThissectionalsodescribeshowyoucanproperlyconstrainyourdesignusingAltera’sTimeQuestTimingAnalyzeravailableintheQuartus®IIsoftware.AN545:DesignGuidelinesandTimingClosureTechniquesforHardCopyASICsJuly2010AN-545-2.1Thisapplicationnotecoverstopicsfromatimingclosureperspective,forthesuccessfulmigrationtoHardCopyASICsfromAltera’sFPGAs.Thefirstsectioncoversmetastability,synchronousandasynchronousresets,andsynchronizinganasynchronousreset.Thissectionalsodescribestechniquesforpassingcontrolanddatasignalsacrossc……

timing_closureAchievingTimingClosurePDFcreatedwithpdfFactoryProtrialversionwww.pdffactory.comOutlineTimingReportsInterpretingTimingReportsReportOptionsSummaryPDFcreatedwithpdfFactoryProtrialversionwww.pdffactory.comTimingReportsTimingreportsenableyoutodeterminehowandwhyconstraintswerenotmet……