Ultra-low power consumption clock control method applied to MCU (Micro-programmed Control Unit) system

Abstract

The invention discloses an ultra-low power consumption clock control method applied to an MCU (Micro-programmed Control Unit) system. In the ultra-low power consumption clock control method, the MCU system is adopted; the whole MCU system includes two clocks of clkcpu and clkper; a low power consumption mode of the system includes an IDLE mode and a STOP mode; when the system enters the IDLE mode, the clock clkcpu is closed and the clock clkper is opened, a CPU (Central Processing Unit) enters a dormant state, only external equipment is working at the moment; when the system enters the STOP mode, the clocks of clkcpu and clkper are simultaneously closed, the CPU enters a deep sleep state, the CPU and the external equipment stop working at the moment. Through the gated clocks and the deep sleep mode, the power consumption of the system is reduced, the overall stability is improved and the service life of a battery is prolonged. In the design of a microprocessor, most of the power consumption comes from the clocks, the clocks cause uninterrupted charging and discharging, thus the power consumption of the whole system is greatly influenced through reduction of the clock activity; the clock gating is conducted from the clock source of the system, the work clocks of the whole MCU are closed, and meanwhile the system is enabled to enter the deep sleep state.

Description

technical field [0001] The invention relates to a control method, in particular to an ultra-low power consumption clock control method applied to an MCU system. Background technique [0002] At present, the design of low power consumption is mainly considered from two aspects of chip design and system design. Increased power consumption will lead to excessive system temperature, thereby reducing reliability. At the same time, R8051MCU is widely used in portable and mobile products. These products do not have sufficient power supply and are often only powered by batteries. Therefore, how to improve system stability and prolong battery life by reducing power consumption becomes more urgent. Contents of the invention [0003] The object of the present invention is to provide an ultra-low power consumption clock control method applied to an MCU system, so as to solve the problems raised in the above-mentioned background technology. [0004] To achieve the above object, the ...

AI Technical Summary

Problems solved by technology

Increased power consumption will cause the system temperature to be too high, thereby reducing reliability

At the same time, the R8051MCU

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