Patent ID: 7698614

Claim:
An electrical device comprising: A. a TDI lead, a TDO lead, a TMS lead, and a TCK lead; B. test access port circuitry having a TDI input coupled to the TDI lead, a TDO output coupled to the TDO lead, a TMS input coupled to the TMS lead, and a TCK input coupled to the TCK lead, the test access port circuitry providing as output signals an enable serial input signal, an input/output sync signal, and a Run Test/Idle signal; C. a logic gate having one input connected to the enable serial input signal, another input connected to the Run Test/Idle output signal, and an output; and D. sync circuitry having a first input connected to the output of the logic gate, a second input connected to the input/output sync signal, a clock input coupled to the TMS lead, and an input enable output.