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:
Jun. 26, 2001
Filed:
Oct. 20, 1999
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 ...
G11C 1/500 ;
U.S. Cl.
CPC ...
G11C 1/500 ;
Abstract
A semiconductor integrated circuit device includes a main memory portion and a sub memory portion including a plurality of memory cell groups, wherein a bi-directional data transfer is performed between an arbitrary area of the main memory portion and each of the plurality of the memory cell groups and the plurality of the memory cell groups function as independent cache memories, respectively. Therefore, the semiconductor integrated circuit device of the present invention has a main memory suitable for being accessed from a plurality of data processors.