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:
Aug. 06, 2019
Filed:
Nov. 28, 2017
Applicant:
Toshiba Memory Corporation, Tokyo, JP;
Inventor:
Yu Nakanishi, Yokohama, JP;
Assignee:
TOSHIBA MEMORY CORPORATION, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/40 (2006.01); G11C 11/406 (2006.01); G11C 11/00 (2006.01); G06F 12/0891 (2016.01); G06F 3/06 (2006.01);
U.S. Cl.
CPC ...
G11C 11/40607 (2013.01); G06F 3/065 (2013.01); G06F 3/0619 (2013.01); G06F 3/0659 (2013.01); G06F 3/0679 (2013.01); G06F 12/0891 (2013.01); G11C 11/005 (2013.01); G11C 11/406 (2013.01);
Abstract
According to one embodiment, a memory device is connectable to a host, and includes a nonvolatile memory, a volatile memory which is used as a cache of the nonvolatile memory and has a higher access speed than the nonvolatile memory, and a controller which controls access to the nonvolatile memory and the volatile memory. The controller increments, when the controller receives a refresh command for the volatile memory from the host, a value of a refresh counter, and executes, when the value of the refresh counter exceeds a threshold, no refresh operation corresponding to the refresh command.