The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2004
Filed:
Feb. 14, 2002
Guy R. Schlacter, Buffalo Grove, IL (US);
Altera Corporation, San Jose, CA (US);
Abstract
Circuitry that includes blocks of memory can be used to emulate a content addressable memory (“CAM”). The CAM data is stored in enough blocks of memory so that all of that data can be gradually read out in the time allowed for completion of a CAM search. As the data is read out, it is compared to CAM search data. If and when a match is found, a CAM address associated with the CAM data found to match the search data is generated. Alternatively or in addition, a simple “match” signal may be generated. If desired, the contents of the emulated CAM may be changed. To do this, circuitry is provided for converting the CAM address of the new data to an appropriate physical address (in the above-mentioned memory blocks) for that data.