Processor and its frequency-reducing device and method

A processor and frequency reduction technology, which is applied in the field of processors, can solve the problems of large interval granularity of frequency reduction and affect the effect of frequency reduction, and achieve the effect of saving power and rationally utilizing power consumption

CN101101504AActive Publication Date: 2008-01-09LOONGSON TECH CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2008-01-09

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Abstract

The invention discloses a processor and the frequency reducing device and method. And the frequency reducing device comprises a multi-bit state converter, a multichannel selector, a frequency reduction coefficient register, and a gated clock circuit, where the frequency reducing device receives original clock and real-timely reads value of the frequency reduction coefficient register, and gates the original clock, so as to complete a function of reducing frequency of original clock. And it can implement a function of dynamically reducing frequency of processor kernel by simple digital logic circuit and at very low cost and the frequency reduction has features of small spacing granularity and high real-timeness, thus completely applying to various universal processors, embedded processors and SOC to achieve the purpose of reducing average operating power consumption of processors and saving electric energy.
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Description

technical field

[0001] The present invention relates to the technical field of processors, in particular to the technical field of processors and their low power consumption. frequency technology. Background technique

[0002] In the design of processor chips, power consumption has become another important technical indicator besides processor performance. Whether in the field of general-purpose processors or in the field of embedded processors, low-power processor design has Wide range of needs and application spaces.

[0003] Since the power consumption of the processor is directly proportional to the clock frequency of the processor, dynamically changing the frequency of the processor according to the needs of the running program during the running of the processor has become an effective means to reduce the power consumption of the processor.

[0004] In the prior art, the processor receives a low-frequency external clock, and then multiplies the frequency of the clock...

Examples

Embodiment Construction

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, a processor and its frequency reduction device and method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] The processor and its frequency reduction device and method of the present invention enable the processor to run at a lower clock frequency than the original clock by controlling the original generated clock of the processor.

[0043] In order to achieve the above object, the present invention provides a processor, which includes a frequency reduction device, as shown in Figure 1, the frequency reduction device includes a state transition machine 11, a multiplexer 12, a frequency reduction coefficient register 13, and a clock gati...