Patent ID: 8543875

Claim:
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 1 -DR state into a Pause-DR state without traversing a Shift-DR state; B. selecting a first TAP controller with first encoded bits on a TDI input to each target system; C. moving only the first TAP controller through an Exit 2 -DR state, a Shift-DR state, the Exit 1 -DR state, and back to the Pause-DR state; D. de-selecting the first TAP controller and selecting a second TAP controller with second encoded bits on the TDI input to each target system; E. moving only the second TAP controller through an Exit 2 -DR state, a Shift-DR state, the Exit 1 -DR state, and back to the Pause-DR state; F. de-selecting the second TAP controller and selecting a third TAP controller with third encoded bits on the TDI input to each target system; G. moving only the third TAP controller through an Exit 2 -DR state, a Shift-DR state, the Exit 1 -DR state, and back to the Pause-DR state; and H. selecting all of the TAP controllers with encoded bits on the TDI input to each target system and moving all of the TAP controllers from the Pause-DR state to an Update-DR state.