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:
Jul. 16, 2002
Filed:
Feb. 22, 2000
Applicant:
Inventors:
Naoya Watanabe, Hyogo, JP;
Yoshikazu Morooka, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ;
Abstract
A data input/output circuit includes an S/P data conversion circuit which converts serial data input to a data terminal into a parallel data and transmits the parallel data to write data lines, a P/S data conversion circuit which converts parallel data on read data lines to serial data and outputs the serial data to the data terminal, and an input/output test circuit placed between the write data lines and the read data lines. The input/output test circuit responds to an input/output test signal to directly transfer data on the write data lines respectively to the read data lines without passing them through a memory cell array.