Entering a shift-DR state in one of star connected components

Details Entering a shift-DR state in one of star connected components Entering a shift-DR state in one of star connected components

2011-06-07

2011-06-07

Chung, Phung M (Department: 2117)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital logic testing

C714S726000

Reexamination Certificate

active

07958419

ABSTRACT:
A method implemented to test a plurality of components coupled in a star configuration, each component having a test access port (TAP) controller. The method comprises performing a capture phase of a scan operation on all of the TAP controllers in the star configuration and sequentially selecting one of the TAP controllers at a time to perform a shift state. When all of the TAP controllers have been sequentially selected to perform the shift phase, the method further comprises selecting all of the TAP controllers to perform an update phase.

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