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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
