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.

Date of Patent:
Dec. 10, 2019

Filed:

Aug. 12, 2018
Applicant:

Rambus Inc., Sunnyvale, CA (US);

Inventors:

Frederick A. Ware, Los Altos Hills, CA (US);

James E. Harris, Tyler, TX (US);

Assignee:

Rambus Inc., Sunnyvale, CA (US);

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/22 (2006.01); G11C 11/4093 (2006.01); G11C 5/04 (2006.01); G11C 5/06 (2006.01); G11C 8/12 (2006.01);
U.S. Cl.
CPC ...
G11C 11/4093 (2013.01); G11C 5/04 (2013.01); G11C 5/063 (2013.01); G11C 7/22 (2013.01); G11C 8/12 (2013.01);
Abstract

A memory module with multiple memory devices includes a buffer system that manages communication between a memory controller and the memory devices. Each memory device supports an access mode and a low-power mode, the latter used to save power for devices that are not immediately needed. The module provides granular power management using a chip-select decoder that decodes chip-select signals from the memory controller into power-state signals that determine which of the memory devices are in which of the modes. Devices can thus be brought out of the low-power mode in relatively small numbers, as needed, to limit power consumption.


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