Semiconductor memory preventing unauthorized copying

Details Semiconductor memory preventing unauthorized copying Semiconductor memory preventing unauthorized copying

2006-02-07

2006-02-07

Phung, Anh (Department: 2824)

Static information storage and retrieval

Floating gate

Data security

C365S195000, C713S183000

Reexamination Certificate

active

06996006

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.

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