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paper special issue on vlsi design and cad algorithms optimization of test accesses with a

paper special issue on vlsi design and cad algorithms optimization of test accesses with a

ID：34420708

大小：128.31 KB

页数：6页

时间：2019-03-06

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1、1PAPERSpecialIssueonVLSIDesignandCADAlgorithmsOptimizationofTestAccesseswithaCombinedBISTandExternalTestSchemeMakotoSUGIHARAy,NonmemberandHirotoYASUURAy,MemberSUMMARYExternalpinsfortestareprecioushardwarere-testapproachisintroducedandexperimentsaredonesourcesbecausethenum

2、berofthemarestronglyrestricted.Inforseveralvirtualcore-basedSOCs.Weaknessesofthispaper,anoptimizationmethodoftestaccesseswithacom-theseproposalsisintheneglectionofthedi erenceofbinedBISTandexternaltest(CBET)schemeisproposed.Themethodcanminimizestestapplicationtimeandelimi

3、natetheprimaryinputsandoutputsportsbetweencores.Therewastefulusageofexternalpinsconsideringthetrade-o betweenareassumptionsthatexternalpinsaresequentiallyoc-testapplicationtimeandthenumberofexternalpins.Ourideascupiedamongcoresforexternaltestandtestpatternsconsistoftwopar

4、ts.OneistodeterminetheoptimumgroupsareserializedifthenumberofportsforCUTishighereachofwhichconsistsofcorestosimultaneouslysharemecha-thanthenumberofexternalpins.Theseassumptionsnismsforexternaltest.Theotheristodeterminetheoptimumbandwidthofexternalinputandoutputforexterna

5、ltest.Theleadtothewastefulusageofexternalpins.In[2],aideasarebasicallyusedforthepurposeofeliminatingthewaste-methodtoshareBISTcircuitamongcoresisdiscussed,fulexternalpinusage.Theideasmakeexternaltestparttobestillsharingsimultaneouslytestbusesamongcoresforunderfullbandwidt

6、hofexternalpinsunderconsiderationoftheexternaltestisnotdiscussed.Itisessentialthatwaste-trade-o betweentestapplicationtimeandthenumberofex-ternalpins.ThisisachievedonlywithCBETschemebecausefulusageofexternalpinsareremovedforreducingtestCBETpermitstestsetsforbothBISTandext

7、ernaltesttobeapplicationtimeandsavingexternalpinsfortest.elastic.Takingtestbusarchitectureforinstance,aformulationWhensystemdesignersusetestbusarchitectureforminimizationoftestapplicationtimeandexperimentalresultsintheirdesign,itisnecessarytoserializetestpatternsareshown.

8、Experimentalresultsshowsthatouroptimizationcantoapplythemtocorrespondingcoresbecausethereareachi

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