Low-power embedded system

Abstract

An embodiment of the invention provides a low-power embedded system. The system comprises a first clock unit, a second clock unit, a third clock unit, a clock switching unit and a working circuit. The first clock unit is used for generating a first clock signal. The second clock unit is used for generating a second clock signal. The third clock unit is used for generating a third clock signal. The clock switching unit is used for receiving the first clock signal, the second clock signal and the third clock signal, selecting one of the first clock signal, the second clock signal and the third clock signal as a target clock signal and outputting the selected clock signal. The working circuit is used for working based on the current target clock signal output by the clock switching unit. The frequency of a system clock working in a low frequency state is gradually adjusted and improved to a target working frequency, thereby preventing the risk of overshoot of transient current of the system, and effectively ensuring the service life of a chip.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a low power consumption embedded system. Background technique [0002] At present, embedded systems have been widely used in portable and mobile products, and these products are often powered by limited batteries. Therefore, when designing embedded systems, how to reduce power consumption (Low-Power), It becomes very important for those skilled in the art to prolong the usage time of the system as much as possible. [0003] The current integrated circuit technology mainly includes TTL and CMOS. Regardless of the technology, as long as there is current passing through the circuit, power consumption will be generated. Usually, the power consumption of an integrated circuit is divided into two parts: static power consumption and dynamic power consumption; The product of the voltage of the circuit and the current flowing through it; dynamic power consumption is the p...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of excessive instantaneous current caused by instantaneous circuit reversal when the operating frequency of the existing embedded system changes from low frequency to high frequency, an embodiment of the present invention provides a low-power embedded system. The system includes: including: A clock unit, a second clock unit, a third clock unit, a clock switching unit and a working circuit, wherein,

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