Register having security function and computer system...

Details Register having security function and computer system... Register having security function and computer system...

2008-07-10

2011-10-11

Bragdon, Reginald (Department: 2189)

Electrical computers and digital processing systems: memory

Address formation

In response to microinstruction

C711S109000, C711S110000, C711SE12091

Reexamination Certificate

active

08037282

ABSTRACT:
A register having a security function is provided. The register includes: a write security unit and a storage unit. The write security unit outputs a first control signal to control whether a write operation is permissible, in response to a write signal, an address signal, and a write permission signal. The storage unit writes and stores input data, in response to the first control signal. The write permission signal is received from an external source and indicates whether to protect the written data.

REFERENCES:
patent: 5721872 (1998-02-01), Katsuta
patent: 6470439 (2002-10-01), Yamada et al.
patent: 2004-280623 (2004-10-01), None
patent: 94-2862 (1994-02-01), None
patent: 98-4741 (1998-03-01), None

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