Device and method for testing a circuit
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United States of America Patent
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Oct 9, 2012
Grant Date -
Apr 15, 2010
app pub date -
Feb 9, 2007
filing date -
Feb 9, 2007
priority date (Note) -
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Abstract
A device having testing capabilities, the device includes: a tested circuit that includes multiple scan chains; a compactor adapted to compress scan chain test responses; a mask unit, connected between the multiple scan chains and the compactor, wherein the mask unit is adapted to mask scan chain test responses outputted by the multiple scan chains during a masking period; and an mask prevention unit, adapted to prevent masking of scan chain test responses during a mask prevention period that at least partially overlaps a mask unit configuration period.
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