A Short Introduction to ASIC Design Flow

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1、AShortIntroductiontoASICDesignFlowinAMISLibraryZhanGuoDigitalASICGroupDepartmentofElectroscienceLundUniversityApr.2003RevisedNov.2003Contents1Overview21.1SettingUpEnvironment.......................22AlgorithmModelling23RTLCoding23.1StyleandTricks...........................23.2Desig

2、nWareComponents......................23.3RAMInstantiation..........................43.4RESETStyle.............................44Synthesis64.1ReadDesign..............................64.2Timing/AreaOptimization.....................64.3PowerEstimationandOptimization................125

3、Pre-LayoutVerification165.1Pre-LayoutFunctionSimulation..................175.2Pre-LayoutStaticTimingAnalysis.................176Layout206.1Timing-DrivenP&R.........................206.2Back-endTasksNotCovered....................227Post-LayoutVerificationandRe-optimization247.1Prepari

4、ngDesignFiles........................247.2Post-LayoutFunctionSimulation..................257.3Post-LayoutStaticTimingAnalysis................257.4Re-optimization............................25Appendix28References3311OverviewAtypicalstandardcellbasedASICdesignflowisusuallybrokendownin

5、tofoursections:Algorithmmodelling,RTLcoding,SynthesisandLayout,asshowninFigure1.Ifthedesignflowisviewedasablack-box,itsinputisaspecificationanditsoutputisaGDSIIfilethatistobesenttothefoundry.ThefoundryinthispaperreferstoAMIS[1].AllthetoolslistedinFigure1areavailableinourgroup.Thepurpo

6、seofthispaperistopresentabrieftutorialforthesetools,anddescribeaclosuredesignflowinAMISlibrary.1.1SettingUpEnvironmentThedesignflowdescribedinthispaperisverifiedinthedesignenvironmentasshowninFigure2.2AlgorithmModellingPleasereferto[2]tohaveaglimpseonthissubject.Thepointsare:•Afixed-po

7、intmodelisneeded,andasetofstimulusisneededastestvectorsforallofthefunctionverificationsinthedesignflow.•Thepossiblemismatchesbetweenthefixed-pointmodelandtherealhard-wareshouldbetakenintoaccount.3RTLCoding3.1StyleandTricksThoughitiscalledcoding,keepinmindthatyouareahardwaredesignernow

8、.Insteadofcodinginsoftware