Patent ID: 8341474
Filing Date: 2012-12-25
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-IR state and an Exit1-IR state into a Pause-IR state without traversing a Shift-IR state; 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 Exit2-IR state, a Shift-IR state, the Exit1-IR state, and back to the Pause-IR state; 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 Exit2-IR state, a Shift-IR state, the Exit1-IR state, and back to the Pause-IR state; and 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-IR state to an Update-IR state.