A low-power embedded system

Abstract

An embodiment of the present invention provides a low-power embedded system, including: a first clock unit, a second clock unit, a third clock unit, a clock switching unit, and a working circuit, wherein the first clock unit is used to generate the second A clock signal; the second clock unit is used to generate the second clock signal; the third clock unit is used to generate the third clock signal; the clock switching unit is used to receive the first clock signal, the second clock signal and the third clock signal, and select a clock signal from the first clock signal, the second clock signal and the third clock signal as the target clock signal and output it; Work. Gradually adjust the frequency of the system clock working in the low-frequency state to the target operating frequency, avoiding the risk of instantaneous current overshoot in the system, and effectively ensuring the service life of the 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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