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:
Feb. 22, 2000
Filed:
Nov. 06, 1998
Applicant:
Inventor:
Takashi Higuchi, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365222 ; 36523003 ;
Abstract
Provided is a structure in which a refresh region to be actually refreshed can be set on an outside of a DRAM. A refresh control register (21) is provided to store a refresh control bit which is sent from the outside and indicates the region to be refreshed. A refresh address deciding circuit (22) is provided to compare a content (RCB) stored in the refresh control register (21) with a refresh address (RAi) output from a refresh address generating circuit (11). An internal timing control circuit (5A) stops operations of a row decoder (3) and a sense amplifier (4) according to a result of a decision made by the refresh address deciding circuit (22).