cadence allegro si培训课件lesson4

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1、Lesson4ExtractingandSimulatingTopologiesExtractatopologyfileusedforsingle-netanalysis.SimulateatopologyusingSigXplorer.UsetheSigWavewaveformmeasurementtool.CorrelateCadencereportedsimulationresultdatawithwaveformmeasurements.UsetheSigXplorersimulationfiles.The

2、AllegroPCBSIDesignFlowPre-PlacementSolutionSpaceAnalysisConstraint-DrivenFloorplanningConstraint-DrivenRoutingPost-RouteDRCPost-RouteAnalysisTheAllegroPCBSIDesignFlowconsistsofthefollowingsixsteps:EYouareHereDoubleClickHeretoOpentheImagePre-RouteExtractionSetu

3、p—DefaultModelSelectionFromtheAllegroPCBSImenuselectAnalyze—SI/EMISim—Preferences.DeterminesiftheDefaultIOCellmodelsaretobeused.DetermineswhichIOCellmodelistobeusedwhenthesimulatorencountersadriverorreceiverpinwithoutanassignedIOCellmodelOpenstheModelBrowserto

4、allowaccesstomodelscurrentlyloaded.DetermineshowthesimulatorobtainstheBufferDelay.Pre-RouteExtractionSetup—UnroutedInterconnectFromtheAllegroPCBSImenuselectAnalyze—SI/EMISim—Preferences.Setsthedefaultlengthforunroutedtransmissionlines.Setsthedefaultimpedanceva

5、lue.Setsthedefaultpropagationvelocityforunroutedtransmissionlines.Setsthedefaultdifferentialimpedanceforunroutedtransmissionlines.Setsthedefaultdifferentialvelocityforunroutedtransmissionlines.Pre-RouteTemplateExtractionFromtheAllegroPCBSImenuselectSetup—Elect

6、ricalConstraintSpreadsheet.TheXnetincludesthedrivers,receiversandinterconnectsofanextendednet.WhatarePhysicalNetsandXnetsElectricalNetsandPhysicalNets.Thissingleextendednet(Xnet)containstwophysicalnets.NetCLK0_1NetCLK0RLabUnroutedInterconnectExtractionSetupPre

7、-LayoutTopologyExtractionforAnalysisSession-1SigXplorer610Pull-DownMenusSpreadsheetTabsNew,Open,SaveZoomfunctionsUndoNotesCanvasCleanupAccessModelBrowsertoaddanelementMove,Copy,Delete,Rotate,MirrorelementsSimulateUpdatecmHelpCommandConsoleModelIntegritySignalL

8、ibrarySigXplorerCommandTabSigXplorerParametersTabToggletodisplaytheunitsontheTLinetoLengthorTime.LengthTimeSigXplorerMeasurementsTabMeasurementsselectedwillhaveanXmarkinthecheckbox