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:
May. 16, 2000
Filed:
May. 29, 1998
Applicant:
Inventor:
Koji Naganawa, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518907 ; 365236 ; 36518901 ; 36518905 ;
Abstract
A non-volatile semiconductor storage device 100 comprised of a bit number detection circuit 120. The bit number detection circuit 120 has a counting circuit 604, a division control circuit 606 and a latch circuit 602. The counting circuit 604 counts the number of memory cells targeted for data writing. The division control circuit 606 specifies four memory cells for simultaneous data writing on the basis of a count value. The latch circuits 602 expect the circuits corresponding to the specified memory cells are reset for data writing prohibition.