Patent ID: 8095840
Filing Date: 2012-01-10
Classification: G01R

Abstract:
1. A process of testing target systems connected in a star configuration, each target system having a test access port controller, comprising: A. moving all of the TAP controllers from a RunTest/Idle state, through a Capture-DR state and an Exit B. selecting one of the TAP controllers with encoded bits on a TDI input to each target system; C. moving only the selected TAP controller through an Exit D. de-selecting the one TAP controller and selecting another one of the TAP controllers with encoded bits on a TDI input to each target system; E. moving only the other selected TAP controller through an Exit F. selecting all of the TAP controllers with encoded bits on a TDI input to each target system and moving all of the TAP controllers from the Pause-DR state to an Update-DR state.