Static information storage and retrieval – Associative memories – Ferroelectric cell
Reexamination Certificate
2006-08-01
2006-08-01
Ho, Hoai V. (Department: 2827)
Static information storage and retrieval
Associative memories
Ferroelectric cell
C365S189070, C365S233100
Reexamination Certificate
active
07085147
ABSTRACT:
Systems and methods for preventing the corruption of a CAM lookup result when a lookup in the CAM and a write to the CAM are concurrently executed. In one embodiment, a tag value is clocked into a tag latch simultaneously with a data value being clocked into a data latch. The tag value and initial CAM element values begin propagating through comparison logic. After a delay, the data value is written from the data latch to a CAM element. After the tag value and initial CAM values propagate through the comparison logic to produce comparison outputs, but before the newly written data value propagates through the comparison logic and changes the comparison outputs, the comparison outputs are latched. The comparison outputs can then be processed as if the data values in the CAM elements had not been changed by the write operation.
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Murakami Hiroaki
Noro Hiromi
Takahashi Osamu
Ho Hoai V.
Kabushiki Kaisha Toshiba
Law Offices of Mark L Berrier
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