Semiconductor integrated circuit apparatus and control method thereof
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United States of America Patent
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Dec 29, 2009
Grant Date -
Oct 4, 2007
app pub date -
Feb 28, 2007
filing date -
Mar 1, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A semiconductor integrated circuit apparatus includes an internal logic circuit unit, a first memory, a second memory and a control circuit unit. The internal logic circuit unit includes scan chains which test circuit normality. The first memory is accessed by the internal logic circuit. The second memory stores valid bits associated with the first memory, wherein the valid bits indicates one of validity and invalidity of data stored in the first memory. The control circuit unit saves internal state data stored in the scan chains to the first memory, and resets the internal state data saved in the first memory to the scan chains.
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