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. 07, 2000
Filed:
Oct. 23, 1998
Applicant:
Inventors:
Christophe Mani, Plan d'Organ, FR;
Mohamad Chehadi, Aix en Provence, FR;
Assignee:
STMicroelectronics S.A., Gentilly, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518504 ; 36518532 ; 365195 ;
Abstract
An electrically erasable and programmable non-volatile semiconductor memory includes memory registers that are addressable individually or by blocks. The memory also has a protection register in which a protection word can be written. The protection word has a given number of bits that encode a boundary address of the memory register or a block of memory registers. The boundary address divides the memory space into an upper zone and a lower zone. The protection word also has a zone bit whose value determines which of the two zones of the memory is to be write protectable.