Partial row expansion by logically combining range representation values in content addressable memory
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United States of America Patent
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Oct 12, 2010
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N/A
app pub date -
Sep 1, 2005
filing date -
Sep 1, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus to reduce the number of rule entries used to implement ranging matching in a Content Addressable Memory (“CAM”) array. A first CAM entry is stored in a single CAM cell of an array of CAM cells. The first CAM entry is compared with a first key entry of the CAM array to generate a first comparison result. Each of multiple second CAM entries is stored in corresponding multiple CAM cells of the array of CAM cells. The multiple second CAM entries are compared with a second key entry to generate multiple second comparison results. A match signal is generated by the CAM array if the first key entry matches the first CAM entry and the second key entry matches one of the multiple second CAM entries.
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