Patent ID: 7089470

Claim:
A programmable boundary scan test transmitter, comprising: a Test Access Port (TAP) controller having a test data out output and a test data in input; a plurality of output AC boundary scan cells (BSCs), each output AC BSC having an input, a test data in input, and a test data out output; a programmable AC_Pattern_Source signal generator configured to produce AC signal patterns that selectively remain unchanged for at least one cycle before and after an original capture cycle location, the programmable AC_Pattern_Source signal generator having an input, a test data in input, a test data out output, and an AC_Pattern_Source signal output, the AC_Pattern_Source signal output coupled to the input of at least one of the plurality of output AC BSCs; and wherein the test data in inputs and test data out outputs, of the TAP controller and the output AC BSCs, respectively, are coupled into a chain from input to output.