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. 18, 2002
Filed:
Aug. 17, 1999
Applicant:
Inventors:
Anuradha N. Moudgal, Fremont, CA (US);
Rick Hetherington, Pleasanton, CA (US);
Timothy G. Goldsbury, Fresno, CA (US);
John P. Petry, San Diego, CA (US);
Assignee:
Sun Microsystems, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 2/900 ;
U.S. Cl.
CPC ...
G11C 2/900 ;
Abstract
On data writes to a cache memory in a digital data processing system, the existing data currently stored on the desired cache storage line is read out and parity checked. The read-out data is modified with new data only if there is no parity error. If a parity error is detected, a cache miss is signaled and the read-out line of data is written back into the cache memory with error correction code checking and error correction being performed on the defective line of data as part of this write-back to the cache memory.