Jtag最新协议2001年颁布的。 Circuitrythatmaybebuiltintoanintegratedcircuittoassistinthetest,maintenance,andsupportofassembledprintedcircuitboardsisdefined.Thecircuitryincludesastandardinterface throughwhichinstructionsandtestdataarecommunicated.Asetoftestfeaturesisd