Method and apparatus for software selection of protected...

Details Method and apparatus for software selection of protected... Method and apparatus for software selection of protected...

2005-06-07

2005-06-07

McLean-Mayo, Kimberly (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S154000

Reexamination Certificate

active

06904504

ABSTRACT:
A circuit includes a switch unit, an non-protected register and a set of protected control registers. The set of protected control registers stores safe data for use by another unit of the circuit. The switch unit outputs the data stored by one of the set of protected control registers as a function of the data stored by the non-protected register. The data in the non-protected register can be changed by software in response to user input, operational mode or other condition or conditions.

REFERENCES:
patent: 4580246 (1986-04-01), Sibigtroth
patent: 5623673 (1997-04-01), Gephardt
patent: 5802376 (1998-09-01), DeRoo
patent: 6314520 (2001-11-01), Schell
patent: 2001/0014036 (2001-08-01), Rapp
patent: 2003/0061461 (2003-03-01), Circello

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