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:
Apr. 19, 1994
Filed:
Sep. 11, 1992
Applicant:
Inventor:
Hiromi Uenoyama, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
36523001 ; 36518901 ; 36518905 ; 36523008 ;
Abstract
A non-volatile IC memory comprising in addition to a PROM region divided into blocks a RAM region having a capacity corresponding to one of the blocks wherein the entire data stored in the corresponding block in the PROM region designated by an address sent out from the outside is transferred to the RAM region. After data in the corresponding portion in the RAM region designated by the address is rewritten by data sent out from the outside, the data in the RAM region is written back in the corresponding block of the PROM, thereby data is rewritten by a word unit or a bit unit.