Select, override and master override controlling multiplexing TDI and TDO
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United States of America Patent
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Jun 11, 2013
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N/A
app pub date -
Dec 12, 2012
filing date -
May 7, 2007
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Abstract
A system comprises a plurality of components, scan chain selection logic coupled to the components, and override selection logic coupled to the scan chain selection logic. The scan chain selection logic selects various of the components to be members of a scan chain under the direction of a host computer. The override selection logic detects a change in the scan chain and, as a result, blocks the entire scan chain from progressing.
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