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:
Mar. 20, 2012
Filed:
Jan. 04, 2008
Shiva R. Dasari, Austin, TX (US);
Sudhir Dhawan, Austin, TX (US);
Joseph Allen Kirscht, Rochester, MN (US);
Jennifer L. Vargus, Cedar Park, TX (US);
Shiva R. Dasari, Austin, TX (US);
Sudhir Dhawan, Austin, TX (US);
Joseph Allen Kirscht, Rochester, MN (US);
Jennifer L. Vargus, Cedar Park, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus to improve memory initialization in a memory of a computer system. Memory units in the memory comprise a plurality of ranks, each rank having a unique rank select. A parity generator outputs a parity bit corresponding to whether an encoded rank select has an even or odd number of '1's. The parity bit is used by an Error Checking and Correcting (ECC) unit that generates ECC bits that are stored in a rank having an active rank select. During a first interval in a memory initialization period, ranks having an even number of '1's in their encoded rank select are initialized in parallel. During a second interval in the memory initialization period, ranks having an odd number of “1”s in their encoded rank select are initialized in parallel.