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:
Jan. 03, 2023
Filed:
Jul. 28, 2021
Applicant:
Winbond Electronics Corp., Taichung, TW;
Inventor:
Takahiko Sato, Yokohama, JP;
Assignee:
WINDBOND ELECTRONICS CORP., Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/406 (2006.01); G11C 11/4096 (2006.01); G11C 11/4076 (2006.01);
U.S. Cl.
CPC ...
G11C 11/40611 (2013.01); G11C 11/4076 (2013.01); G11C 11/4096 (2013.01); G11C 11/40626 (2013.01);
Abstract
A semiconductor memory device is provided. The semiconductor memory device can suppress increases in power consumption. As a result, damage to the data normally caused by row hammer problem can be prevented. The semiconductor memory device includes a control unit. The control unit controls a refresh operation for a memory to be performed at any interval, wherein there are a plurality of possible intervals. When read/write access to the memory is required, the control unit controls the refresh operation for the memory to be performed with a shortest interval among the intervals, until a predetermined condition is met.