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:
Jan. 27, 2009
Filed:
Mar. 30, 2007
Linda M. Dawson, Hoffman Estates, IL (US);
Sek M. Chai, Streamwood, IL (US);
Linda M. Dawson, Hoffman Estates, IL (US);
Sek M. Chai, Streamwood, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A content addressable memory (CAM) is disclosed that includes a memory having a first port configured to write a 1-bit data to the memory and a second port configured to read and write N-bit data. To update the CAM, an N-bit zero data word is written to the second port at a first address Ato erase N bits of the memory at address A, then the first address Ais combined with a data value Ato form a second address A. Finally, a value 1 is written to the first data port at the address A. Reading the second port at the first address Awill produce an N-bit data word having value 1 at bit position Aand zeros at all other bit positions. The CAM may be configured in reconfigurable hardware using random access memory and used in a stream data interface circuit.