Method and system for emulating content-addressable memory...

Details Method and system for emulating content-addressable memory... Method and system for emulating content-addressable memory...

2008-05-27

2008-05-27

Bragdon, Reginald G. (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S104000

Reexamination Certificate

active

07380053

ABSTRACT:
A method and system for emulating content-addressable memory (CAM) primitives (e.g., a read operation) is disclosed. According to one embodiment, a method is provided for emulating a read operation on a plurality of CAM elements utilizing a read input including match input data and a CAM element selection index. In the described method, match reference data is distributed among a plurality of random-access memory (RAM) elements by storing match reference data corresponding to each of the plurality of CAM elements within a first RAM element of the plurality. Thereafter, a first record is identified within the first RAM element utilizing a first portion of the match input data and the CAM element selection index. A read operation result is then generated utilizing the first record.

REFERENCES:
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patent: 6353332 (2002-03-01), Brelet
patent: 6754766 (2004-06-01), Schlacter
patent: 6781857 (2004-08-01), Lien et al.
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Defossez, Marc, XILINX,Content Addressable Memory(CAM)in ATM Applications; XAPP202, Sep. 23, 1999 (v1.1); pp. 1-14.
Brelet, Jean-Louis and New, Bernie, XILINX,Designing Flexible, Fast CAMs with Virtex Family FPGAs; XAPP203, Sep. 23, 1999 (v1.1); pp. 1-17.
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