Method for protecting a security real time clock generator...

Details Method for protecting a security real time clock generator... Method for protecting a security real time clock generator...

2007-11-20

2010-06-08

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Security

C713S193000, C713S194000

Reexamination Certificate

active

07733117

ABSTRACT:
A device having protection capabilities, the device includes a voltage supply unit that is connected to an integrated circuit and provides a supply voltage to the integrated circuit; wherein the integrated circuit includes: a security real time clock generator that includes an input; a masking unit that is connected to the input, wherein the masking unit isolates the input when a voltage supply monitor is disabled; and wherein the voltage supply monitor monitors the voltage supply unit and wherein a change in a level of supply voltage affects a level of a signal provided to the input.

REFERENCES:
patent: 5920727 (1999-07-01), Kikinis et al.
patent: 2002/0083284 (2002-06-01), Matsubara et al.
patent: 2004/0128528 (2004-07-01), Poisner
patent: 2004/0225439 (2004-11-01), Gronemeyer
patent: 2006/0007616 (2006-01-01), Pan et al.
patent: 2007/0268059 (2007-11-01), Sakaguchi et al.
patent: 150480 (1984-12-01), None

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