1149.1-1990 - IEEE Standard Test Access Port and Boundary-Scan Architecture
Description: IEEE Std. 1149.1-1990, defines circuitry that may be built into an integrated circuit to assist in the test, maintenance, and support of assembled printed circuit boards. The circuitry includes a standard interface through which instructions and test data are communicated. A set of test features is defined, including a boundary-scan register, such that the component is able to respond to a minimum set of instructions designed to assist with testing of assembled printed circuit boards.