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:
Dec. 19, 2000
Filed:
Jan. 07, 1999
Applicant:
Inventors:
Hisashi Iwamoto, Hyogo, JP;
Takashi Kubo, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365201 ; 36523003 ; 36523004 ; 365233 ;
Abstract
A synchronous semiconductor memory device includes a prefetch selector receiving first and second data respectively read from first and second memory cells corresponding to even and odd addresses for outputting them to a data input/output terminal. The prefetch selector sequentially outputs first and second data to the data input/output terminal in one period of a clock period in the normal operation, determines if the first and second data match in a test mode, and outputs the determination result to the data input/output terminal in one period of the clock period.