Intel Corporation

Robert R Beutler

James W Conary

A microprocessor that operates at the speed of the the bus or at a speed which is a multiple of the bus speed-on a selectable basis. The microprocessor includes a phase locked loop to generate clock signals for operations within the microprocessor and bus clock signals for data transfer operations on the bus. The present invention allows a microprocessor core to operate at the same frequency or twice the frequency of the address/data buses.

Integrated circuit having a core which operates at a speed greater than

A method and apparatus for powering down a microprocessor in a computer system. The method and apparatus includes a phase locked loop (PLL) circuit, wherein the phase locked loop generates bus clock signals for clocking the operations on the bus and core clock signals for clocking the core of the processor in response to global clock signal of the computer system. The microprocessor includes circuitry for processing data synchronous with the core clock signals. The method and circuit also includes circuitry for placing the processor in a reduced power consumption state in response to the execution of a power down instruction. In this manner, the computer system reduces power consumption.

Method and apparatus for powering down an integrated circuit

A microprocessor that operates at the speed of the the bus or at a speed which is a multiple of the bus speed on a selectable basis. The microprocessor includes a phase locked loop to generate clock signals for operations within the microprocessor and bus clock signals for data transfer operations on the bus. The present invention allows a microprocessor core to operate at the same frequency or twice the frequency of the address/data buses.

Apparatus for operating a microprocessor core and bus controller at a

A method and apparatus for allowing a processor to invalidate an individual line of its internal cache while in a non-clocked low power state. The present invention includes circuitry for placing the processor in a reduced power consumption state. The present invention also includes circuitry for powering up the processor out of the reduced power consumption state to invalidate data in the cache in order to maintain cache coherency while in the reduced power consumption state.

Method and apparatus for invalidating a cache while in a low power state

A microprocessor that operates at the speed of the bus or at a speed which is a multiple of the bus speed on a selectable basis. The microprocessor includes a phase locked loop to generate clock signals to clock the operations within the microprocessor and bus clock signals to clock data transfer operations between the microprocessor and the bus.

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Lake Oswego, OR, United States of America

Robert R Beutler