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:
Sep. 24, 2013
Filed:
Feb. 27, 2013
International Business Machines Corporation, Armonk, NY (US);
Mark A. Brittain, Pflugerville, TX (US);
John S. Dodson, Pflugerville, TX (US);
Benjamin L. Goodman, Cedar Park, TX (US);
Stephen J. Powell, Austin, TX (US);
Jeffrey A. Stuecheli, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for performing refresh operations on a rank of memory devices is disclosed. After the completion of a memory operation, a determination is made whether or not a refresh backlog count value is less than a predetermined value and the rank of memory devices is being powered down. If the refresh backlog count value is less than the predetermined value and the rank of memory devices is being powered down, an Idle Count threshold value is set to a maximum value such that a refresh operation will be performed after a maximum delay time. If the refresh backlog count value is not less than the predetermined value or the rank of memory devices is not in a powered down state, the Idle Count threshold value is set based on the slope of an Idle Delay Function such that a refresh operation will be performed accordingly.