IEEE Std 1149
Circuitrythatmaybebuiltintoanintegratedcircuittoassistinthetest,maintenance,andsupportofassembledprintedcircuitboardsisdefined.Thecircuitryincludesastandardinterfacethroughwhichinstructionsandtestdataarecommunicated.Asetoftestfeaturesisdefined,includingaboundary-scanregister,suchthat
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