Nonvolatile semiconductor memory device and method for...

Details Nonvolatile semiconductor memory device and method for... Nonvolatile semiconductor memory device and method for...

2006-02-07

2006-02-07

Nguyen, Hiep T. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

Reexamination Certificate

active

06996692

ABSTRACT:
An inventive nonvolatile semiconductor memory device is provided, in advance, with a column latch circuit29for performing a batch write operation (page latching operation, page programming operation, and verifying operation), and the column latch circuit29is utilized to realize a security function. The inventive memory device is further provided with a security control circuit41for carrying out control so that a password for deactivating the security function is stored in the column latch circuit29and a verifying operation is performed to determine whether the password stored in the column latch circuit29is identical to a security function deactivation code stored in a deactivation code storage13. If it is determined that the password and the security function deactivation code are identical as a result of the verifying operation, the security function is deactivated.

REFERENCES:
patent: 4590552 (1986-05-01), Guttag et al.
patent: 5097445 (1992-03-01), Yamauchi
patent: 5216633 (1993-06-01), Weon et al.
patent: 5469564 (1995-11-01), Junya
patent: 6226199 (2001-05-01), Ichikawa
patent: 1115058 (1996-01-01), None
patent: 0 660 215 (1995-06-01), None
patent: P2001-306400 (2001-11-01), None
patent: WO 01/71497 (2001-09-01), None

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