PTPX学习笔记1

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1、PrimeTimePX学习笔记1PTPXisusedtoaccuratelyanalyzepowerdissipationwithPT.PrimeTimePXsupportsagate-level netlistonly.Power=LeakagePower+DynamicPower(internalpowerandswitchingpower).YoucanusethefollowingpoweranalysistechniqueswithPrimeTimePX:*AveragedpoweranalysisF

2、orpurelyaveragedpoweranalysis,PrimeTimePXsupportspropagationofswitchingactivitybasedondefaults,user-definedswitching,orswitchingderivedfromanHDLsimulation(eitherRTLorgatelevel).*Time-basedpoweranalysisForextremelyaccurateanalysisofpowerwithrespecttotime,Prim

3、eTimePXsupportsanalysisbasedontheRTLorgate-levelsimulationactivityovertime.PrimeTimePXusesanevent-drivenalgorithmtocalculatethepowerconsumptionforeachevent.Detailedtime-basedpowerwaveformsaregeneratedtoprovidebothaverageandpeakpowerresults.Thetoolcanproducea

4、naverageandpeakpowerreport.RequiredFilesdescriptions:Gate-LevelNetlistTechnologyLibraryPTPXsupportseitherCCS(compositecurrentsource)orNLPM(nonlinearpowermodel).Youusethepower_model_preferencenlpm

5、ccsvariabletospecifyyourpowermodelpreferencewhenthelibrarycont

6、ainsbothNLPMandCCSdata.Thedefaultisccs.SDCFileTheSDCfilecontainsthedesignconstraints.Thedrivercellinformationisusedtocalculate thetransitiontimeontheprimaryinputs.ParasiticFileSwitchingActivityIntheaveragedpoweranalysis,youuseeitherSAIForVCDfileformatstoread

7、theswitching activity.Ifyoudonotspecifyswitchingactivityinformation,thetoolassumescertaindefault valuesfortheswitchingactivity.Intime-basedpoweranalysis,youuseVCDfileformatstoreadtheswitchingactivity.WhenyoureadaSAIFfileoranRTLVCDfileforpowerestimation,useth

8、eset_rtl_to_gate_name commandtomaptheRTLandgate-levelobjectnames.Thiscommandisespeciallynecessaryifyou haveperformedonlytheRTLsimulationforgeneratingthebackwardSAIFfile.BecausetheRTL objectnamescanchangeaftersynthesis,theread_saiforread_vcdcommandisnotableto

9、mapthe namespresentintheRTLSAIForVCDfiletothegate-levelobjects,whichcanresultin inaccurateresults.Youcanavoidthisbyusingtheset_rtl_to_gate_namecommand.AveragedPowerAnalysisModeScript:###########