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:
Feb. 07, 2006
Filed:
Jun. 23, 2004
Shinichi Ishimoto, Tokyo, JP;
Yoshikazu Miyawaki, Hyogo, JP;
Shinji Kawai, Hyogo, JP;
Atsushi Ohba, Hyogo, JP;
Shinichi Ishimoto, Tokyo, JP;
Yoshikazu Miyawaki, Hyogo, JP;
Shinji Kawai, Hyogo, JP;
Atsushi Ohba, Hyogo, JP;
Renesas Technology Corp., Tokyo, JP;
Renesas Solutions Corporation, Tokyo, JP;
Abstract
A memory mat is provided separately from a memory mat that is a normal memory area, and data therein cannot be read from the outside. In a page buffer, information input from the outside is stored. A comparing circuit compares security information stored in memory mat with information stored in page buffer, and the comparison result is output to the outside as a status. Even when unauthorized copying is performed, information in memory mat is not copied. Therefore, an external apparatus can easily determine whether or not the semiconductor memory is an unauthorized copy by referring to the status.