Longest match detection in a CAM

Details Longest match detection in a CAM Longest match detection in a CAM

2006-03-21

2006-03-21

Elms, Richard (Department: 2824)

Static information storage and retrieval

Associative memories

Ferroelectric cell

C711S108000, C365S230060

Reexamination Certificate

active

07016210

ABSTRACT:
An apparatus and method for a CAM priority match detection circuit that identifies one or more CAM words from a group of CAM words having a “longest match” that matches the bits in a corresponding comparand register. A decoder uses n input lines and m complement lines to generate 2noutputs, wherein only one of the outputs will be active. A priority setting circuit resolves an initial matching operation to supply priority values to CAM words, and a priority resolving circuit processes the priority values to determine an overall priority for a group of CAM words.

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