Patent ID: 7395467
Filing Date: 2008-07-01
Classification: G01R

Abstract:
1. TAP removal and replacement circuitry comprising: A. a test data input lead; B. a test data output lead; C. a test clock input lead; D. a test mode select input lead; E. TAP domain selection circuitry having inputs coupled to the test data input lead, the test clock input lead, and the test mode select lead, and having a serial output, a remove control output, and a control output bus; F. multiplexer circuitry having one data input coupled to the test data input lead, another data input connected to the serial output, a control input, and an output coupled to the test data output lead; and G. multiplexer control circuitry having an input connected to the test mode select input lead, a remove control input connected to the remove control output of the TAP domain selection circuitry, a connection with the control output bus, and a control output connected to the control input of the multiplexer circuitry.