Cyclone III Design Guidelines

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1、CycloneIIIDesignGuidelines©November2008AN-466-1.2IntroductionTheCyclone®IIIFPGAfamilyofferedbyAltera®isacost-optimized,memory-richFPGAfamily.CycloneIIIFPGAsarebuiltonTaiwanSemiconductorManufacturingCompany's(TSMC)65-nmlow-power(LP)processtechnologywit

2、hadditionalsiliconoptimizationsandsoftwarefeaturestominimizepowerconsumption.WiththisthirdgenerationintheCycloneseries,Alterabroadensthenumberofhighvolume,cost-sensitiveapplicationsthatcanbenefitfromFPGAs.Withagooddesignpracticeandaclearunderstandingo

3、fthedesignflowoftheCycloneIIIdevice,yourdesignflowwillbemucheasier.ThisdesignguidelinesummarizesnotonlythevariousaspectsoftheCycloneIIIdevice,butalsotheQuartus®IIsoftwarefeaturesthatyoushouldlookintowhendesigningwiththeCycloneIIIdevices.Thisdocumentco

4、versthefollowingtopics:■“DeviceSelection”onpage1■“EarlySystemPlanning”onpage3■“BoardDesignConsiderations”onpage17■“DesignandCompilation”onpage28■“Verification”onpage45■“DesignDebugging”onpage55■“Testing”onpage56■“OtherConsiderations”onpage56DeviceSele

5、ctionThissectionprovidestheinformationforyoutoconsiderwhenchoosingaCycloneIIIdeviceforyoursystem.DeviceFeatureConsiderationTheCycloneIIIdevicefamilyoffersover5,000logicelements(LEs)tonearly120,000LEsandissuitableforawiderangeofapplications.Alwayschoos

6、eadevicethathasmoreLEsthantheestimatedcountforyourdesignrequirementssothatyouhaveextraLEseitherwhenyouwanttoupgradeorexpandyourdesign.ConsiderhavingadditionalLEsandmemoriesfordebuggingpurposes.AdditionalresourcesalsoallowmoreflexibilitywiththeQuartusI

7、Isoftwareforoptimizingplacementandroutingformaximumperformance,lowerpowerconsumptionorboth.Table1showsthenumberofLEs,memorybits,multipliers,PLLsandglobalclocknetworksfordevicesacrosstheCycloneIIIfamily.fFormoreinformationabouttheCycloneIIIdeviceresour

8、cesacrossdevicedensity,refertotheCycloneIIIDeviceFamilyOverviewchapterinvolume1oftheCycloneIIIDeviceHandbook.©November2008AlteraCorporationPage2DeviceSelectionTable1.CycloneIIIFPGADeviceFamilyFeaturesFeatureEP3C5EP3C10EP3C16EP3C25EP3C40EP3C55E