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:
Mar. 21, 1995
Filed:
Jul. 17, 1992
Applicant:
Inventors:
Youichi Suzuki, Yokohama, JP;
Makoto Segawa, Yokohama, JP;
Toshiaki Ohno, Kawasaki, JP;
Sumako Shiraishi, Kawasaki, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365201 ; 365233 ;
Abstract
A semiconductor memory device having a normal mode of reading and writing data from and to a selected memory cell of a memory cell array. The semiconductor memory device is characterized by control means for switching the normal operation mode to a test mode in response to a test mode signal applied to a certain input terminal, selecting all desired memory cells of the memory cell array at a time, and allowing data applied to a data input terminal to be written to all the selected and desired memory cells at one time.