Memory with CAM and RAM partitions

Details Memory with CAM and RAM partitions Memory with CAM and RAM partitions

1992-06-08

1995-01-17

Dixon, Joseph L.

Static information storage and retrieval

Associative memories

Ferroelectric cell

364DIG1, 395425, G06F 1200

Patent

active

053831462

ABSTRACT:
A method is described of programming a memory array on a single integrated circuit so that a portion of each data word is characterized as CAM, with the remaining portion of each data word functioning as RAM. The programmable memory array is partitioned into CAM and RAM subfields by disabling the comparators in each memory cell in selected columns of CAM cells to create RAM-functioning cells. Said partitioning may be re-programmed to enable the comparators in said RAM-functioning cells to be re-enabled, so that said cells may participate in subsequent comparisons to a search word. The described memory array permits direct retrieval and storage of associated information in RAM-functioning cells corresponding to data words which are determined to match a given search word. This direct retrieval and storage process can efficiently be utilized without computing or decoding an address for the associated information.

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