Variable field content addressable memory
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United States of America Patent
Stats
-
Jul 4, 1989
Grant Date -
N/A
app pub date -
Dec 10, 1987
filing date -
Dec 10, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable field content addressable memory (VFCAM) unit cell comprises a 4-bit content addressable memory, a programmer and a field selector. A limited capability of comparing between limits is provided by using mask bits at the data line inputs to the VFCAM unit cell. A plurality of VFCAM unit cells may be cascaded vertically and horizontally to provide a Y words by X bits VFCAM array. The VFCAM array is programmable by a field code coupled to field partition logic which selects the same number of fields in all memory locations and the number of bits in each field, and an operational VFCAM system results when the VFCAM array is coupled to an input address decoder, an I/O register and an output encoder.
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