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【应用笔记】Altera器件的IEEE1149.1JTAG边界扫描测试(IEEE1149.1JTAGBoundary-ScanTestinginAlteraDevices)当印刷电路板(PCB)变得越来越复杂的时候，全面彻底测试的需求也变得越来越重要呀。Asprintedcircuitboards(PCBs)becomemorecomplex,theneedforthoroughtestingbecomesincreasinglyimportant.AdvancesinsurfacemountpackagingandPCBmanufacturinghaveresultedinsmallerboards,makingtraditionaltestmethods—externaltestprobesand“bedof-nails”testfixtures—hardertoimplement.Asaresult,costsavingsfromPCBspacereductionsaresometimesoffsetbycostincreasesintraditionaltestingmethods.IEEE1149.1JTAGBoundary-ScanTestinginAlteraDevicesJune2005,ver.6.0ApplicationNote39IntroductionAsprintedcircuitboards(PCBs)becomemorecomplex,theneedforthoroughtestingbecomesincreasinglyimportant.Advancesinsurface-mountpackagingandPCBmanufacturinghaveresultedinsmallerboards,makingtraditionaltestmethods―externaltestprobesand“bed-……