ROM-based multiple match circuit

Details ROM-based multiple match circuit ROM-based multiple match circuit

2006-10-04

2009-10-13

Chace, Christian P (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S102000, C365S104000

Reexamination Certificate

active

07603513

ABSTRACT:
A ROM-based multiple match system and method for producing a match signal in an addressable memory system are described. In various embodiments of the present invention, a ROM is used to generate single match and multiple match signals, as well as encoded address signals indicating a matching location(s) within the memory. The ROM is provided with specific entries in the form of a lookup table, which are used to signal combinational logic that provides an output to the system. In certain embodiments of the invention, the ROM may be divided into hierarchical sub-blocks that provide more efficient processing of a digital data related to matching of an input word, improved usage of space within a chip or better scalability across the multiple match system.

REFERENCES:
patent: 7043601 (2006-05-01), McKenzie et al.
patent: 2002/0145178 (2002-10-01), Tsao et al.
patent: 2002/0161969 (2002-10-01), Nataraj et al.
patent: 2003/0145178 (2003-07-01), Jiang et al.

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