Patent ID: 11906582
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A device comprising:
a test data in (TDI) input terminal;
a test mode select (TMS) input terminal;
a test clock (TCK) input terminal;
a test data out (TDO) output terminal;
a first access port circuit configured to operate according to Institute of Electrical and Electronics Engineers (IEEE) standard 1149.1, wherein the first access port circuit includes:
a data input coupled to the TDI input terminal;
a control input coupled to the TMS input terminal;
a clock input coupled to the TCK input terminal;
a data output; and
a first enable output;

a second access port circuit configured to operate apart from the IEEE standard 1149.1, wherein the first access port circuit includes:
a data input coupled to the TDI input terminal;
a control input coupled to the TMS input terminal;
a clock input coupled to the TCK input terminal;
a data output; and
a second enable output; and

an output control circuit including:
a first data input coupled to the data output of the first access port circuit;
a second data input coupled to the data output of the second access port circuit;
a first enable input coupled the first enable output;
a second enable input coupled to the second enable output; and
a data output coupled to the TDO output terminal.