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:
Jan. 15, 2002
Filed:
Sep. 16, 1998
Applicant:
Inventors:
Taketo Maesako, Tokyo, JP;
Kouki Yamamoto, Tokyo, JP;
Yoshinori Matsui, Tokyo, JP;
Kenichi Sakakibara, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/300 ; G11C 1/134 ;
U.S. Cl.
CPC ...
G06F 1/300 ; G11C 1/134 ;
Abstract
A semiconductor integrated circuit device includes a main memory portion, a sub memory portion including a plurality of memory cell groups and a bidirectional data transfer circuit provided between the main memory portion and the sub memory portion. A bi-directional data transfer between an arbitrary area of the main memory portion and the plurality of the memory cell groups, and a read or write operation are performed simultaneously. Therefore, the semiconductor integrated circuit device has a main memory suitable for being accessed from a plurality of memory masters or data processors.