System LSI

Electrical computers and digital processing systems: support – Computer power control – Power conservation

Reexamination Certificate

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Details

C713S320000

Reexamination Certificate

active

06895519

ABSTRACT:
A system LSI dynamically and speedily controls clocks of various frequencies as used in a wide range of operation modes from high-speed to low-speed operation modes, enabling user selection of a system of power consumption type most suitable. The system LSI includes a ROM that stores a clock control library for carrying out clock state transitions between ordinary operation modes; and a system control circuit having a register for carrying out clock state transitions between ordinary operation modes and special modes responsive to changes in value of the register, and also carrying out clock state transitions among ordinary operation modes responsive to the clock control library. Calling of the clock control library and changing of the register value are controlled by an application program. The main library of the clock control library is described and called using C language.

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patent: 6574739 (2003-06-01), Kung et al.
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patent: 2000-116887 (2000-04-01), None
patent: 2001-202155 (2001-07-01), None
patent: 2001-238190 (2001-08-01), None
patent: 2002-182776 (2002-06-01), None

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Profile ID: LFUS-PAI-O-3402005

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