Method and apparatus for limiting processor clock frequency

Details Method and apparatus for limiting processor clock frequency Method and apparatus for limiting processor clock frequency

2008-07-01

2008-07-01

Butler, Dennis M (Department: 2115)

Electrical computers and digital processing systems: support

Clock, pulse, or timing signal generation or analysis

Multiple or variable intervals or frequencies

C713S601000

Reexamination Certificate

active

07395449

ABSTRACT:
A method and apparatus for limiting a processor clock frequency includes an overclocking prevention circuit. The overclocking prevention circuit includes a frequency limiting circuit having programmable fusible elements. The frequency limiting circuit outputs a signal identifying a maximum processor clock frequency based on the state of each of the fusible elements. A comparator circuit compares a selected processor clock frequency to the maximum processor clock frequency to determine if the selected processor clock frequency is permitted. If the selected processor clock frequency is not permitted, then the processor is not allowed to operate at the selected clock frequency.

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