Content addressable memory decomposition

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United States of America Patent

PATENT NO 9899088
SERIAL NO

14862750

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Abstract

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Circuits and methods are disclosed for decomposition of a content addressable memory into a plurality of CAMs having a lower cost. In an example implementation, a set of CAM rules are grouped into a plurality of subsets. For each of the subsets, CAM rules in the subset are reformatted for storage in a respective CAM configured to store fewer ternary bits or configured for prefix match. Each reformatted subset of CAM rules are stored in the respective CAM. A search key formatting circuit is configured to reformat an input search key for each of the respective CAMs is used to store the reformatted subsets to produce a respective reformatted search key and input the respective reformatted search key to the respective CAM.

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Patent Owner(s)

  • XILINX, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jiang, Weirong San Jose, US 17 70

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