SoC设计方法与实现第二章设计流程

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1、第二章SoC设计流程OutlinesHardware/software(HW/SW)co-designflowStandardcellbaseddesignflowDualityofSoftwareandHardwareThehardwareandsoftwareinanembeddedsystemworktogethertosolveaproblemHowtopartitionisusuallydictatedbyspeedandcostDedicatedhardwareisfast,inflexibleandexpensiv

2、eReconfigurablehardwareisfast,flexibleandmoreexpensiveSoftwareisslower,moreflexibleandcheaperHW/SW–ProandConHardwaresolution:PROCanbefactorsof10X,100XorgreaterspeedincreaseRequireslessprocessorcomplexity,sooverallsystemissimplerLesssoftwaredesigntimerequiredUnlesshar

3、dwarebugisfatal,workaroundsmightbedoableinsoftwareHardwaresolution:CONLargeNREchargesPotentiallylongdevelopmentcycleLittleornomarginforerrorOnly50%ofASICICsworkthefirsttimeIPRoyaltychargesHardwaredesigntoolscanbeverycostlyHW/SW–ProandConSoftwaresolution:PRONoaddition

4、alimpactonmaterialscosts,powerrequirements,circuitcomplexityBugsareeasilydealtwith,eveninthefield!SoftwaredesigntoolsarerelativelyinexpensiveNotsensitivetosalesvolumesSoftwaresolutions:CONRelativeperformanceversushardwareisgenerallyfarinferiorAdditionalalgorithmicreq

5、uirementsforcesmoreprocessingpowerBigger,faster,processorsMorememoryBiggerpowersupplyRTOSmaybenecessary(royalties)MoreuncertaintyinsoftwaredevelopmentscheduleHW/SWCo-Design:NewDesignMethodologyESLdesignmakeco-designeasierHW/SWpartitioningCo-specification,co-analysis,

6、co-simulation,co-verificationInterfacesynthesisVerificationofcompletesystem–bothHW/SWESLCo-designFlowSoCDesignFlowHardware/softwareco-designflowDetailedhardwaredesignflowStandardCellBasedASICDesignFlowTraditionalASICDesignFlow–cont.DetailedDesignFlowDetailedDesignFlo

7、w–cont.DetailedDesignFlow–cont.Thankyou