Configurable IC's with dual carry chains
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United States of America Patent
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Jan 8, 2013
Grant Date -
Aug 18, 2011
app pub date -
Nov 18, 2010
filing date -
Jun 30, 2004
priority date (Note) -
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Abstract
A configurable integrated circuit (“IC”) that includes several configurable tiles, each of which has a set of configurable logic circuits and a set of configurable routing circuits for routing signals between configurable logic circuits. The configurable IC provides a set of associated configurable logic circuits for performing a particular portion of a larger arithmetic operation. The configurable IC provides a carry circuit for generating a carry out signal for the particular portion of the larger arithmetic operation. A configurable storage element is for configurably storing the carry out signal and for providing the stored carry out signal to the carry circuit for performing a subsequent portion of the larger arithmetic operation. The configurable IC provides a configurable interconnect/storage element for configurably routing a carry signal from a first carry chain to a second carry chain and for storing the routed carry signal.
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