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Clock control device, microprocessor, electronic device, clock control method, and clock control program

A microprocessor, clock-controlled technology, applied in the direction of electrical digital data processing, digital data processing components, instruments, etc., can solve problems such as multi-time

Inactive Publication Date: 2006-02-15
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to perform this control, it is assumed that the output frequency of the oscillator and the PLL circuit can be changed. Once the supply of the operating clock to the microprocessor is stopped, the frequency of the operating clock is changed. In such a case, it is necessary to sequentially Executes a sequence of programs and for them to change, requires more time than the operating frequency of the microprocessor
Therefore, when developing software that operates on a microprocessor, it must be developed in consideration of the time required to change the operating frequency of the microprocessor, so that the development has many constraints

Method used

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  • Clock control device, microprocessor, electronic device, clock control method, and clock control program
  • Clock control device, microprocessor, electronic device, clock control method, and clock control program
  • Clock control device, microprocessor, electronic device, clock control method, and clock control program

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Embodiment Construction

[0030] Below, through Figure 1 to Figure 5 An example of one embodiment of the present invention will be described.

[0031] First, the microprocessor system of the present invention will be described, and the system configuration of an example thereof is shown in FIG. 1 . As shown in the figure, various input / output devices 5, registers 6, memory 7, etc. are connected in parallel to the microprocessor 1 via the microprocessor bus 4, but the clock control device 2 of the present invention is also connected to the microprocessor 1 in the same manner. Incidentally, in this example, a system configuration including only one microprocessor 1 is assumed, but the present invention is also applicable to a microprocessor system including a plurality of microprocessors.

[0032] The clock oscillator 3 generates a system clock 8, which is directly input to various input / output devices 5, registers 6, memory 7, clock control device 2, and the like as an operating clock. However, it ca...

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Abstract

It is possible to easily and instantaneously modify the number of pulses of the operation clock to a microprocessor. While at least a bus busy signal (10) indicating that the bus (4) is busy from a microprocessor (1) is present by a clock control device (2), a clock of the same number of pulses as the system clock (8) is supplied as the operation clock (9) to the microprocessor (1). While the bus busy signal (10) is absent, an intermittent clock subtracted by the number of pulses of the system clock (8) is supplied as the operation clock (9) to the microprocessor (1).

Description

technical field [0001] The present invention relates to a clock control device and a control method for controlling the number of pulses of an operating clock to a microprocessor, a microprocessor including the clock control device, electronic equipment including the microprocessor as a control processing unit, and A clock control program that controls the number of pulses of the microprocessor's operating clock. Background technique [0002] When the processing of the software executed on the microprocessor has a margin in terms of time, the power consumption can be reduced by reducing the operating clock frequency of the microprocessor. Although the operating clock frequency of the microprocessor has been reduced in conventional microprocessor systems, the actual situation is that the mechanism is realized by exclusively changing the frequency in the clock oscillation source. Specifically, the output frequency of an oscillator as an oscillation sourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/04G06F1/08
CPCG06F1/08G06F1/3228G06F1/324Y02B60/1217Y02D10/00
Inventor 花木博一
Owner SONY CORP