Low-power-consumption key and external interrupt compatible wake-up circuit and control method thereof

Abstract

The invention discloses a low-power-consumption key and external interrupt compatible wake-up circuit, which comprises: a Schmitt trigger comprising an input interface for receiving an external interrupt signal, a signal control end for controlling the enabling of the external interrupt signal, and an output interface; a first phase inverter, wherein the input end of the first phase inverter is connected with a power supply control signal for controlling a clock module power supply, and the output end of the first phase inverter is connected with the input end of the first level converter; a first level converter, wherein the output end of the first level converter is connected with the input end of the second level converter; a second level converter, wherein the output end of the secondlevel converter is connected with one input end of a first AND gate; a third level converter, wherein the input end of the third level converter is connected with a power supply control signal, and the output end of the third level converter is connected with the other input end of the first AND gate; the first AND gate which outputs a bottom circuit power supply signal for controlling the bottomcircuit to supply power; and a second AND gate, wherein the other input end of the second AND gate is in signal connection with the key, and the output end of the second AND gate is connected with oneinput end of the first AND gate.

Description

technical field [0001] The invention relates to the field of circuit wake-up, in particular to a low-power button and external interrupt compatible wake-up circuit and a control method thereof. Background technique [0002] With the rise of the Internet of Everything and artificial intelligence, more and more low-cost, low-power wireless communication solutions are emerging to provide solutions to the "last mile" problem of the Internet of Things. Low-power design has become a major The technical focus of chip manufacturers. [0003] In order to achieve extremely low power consumption, the chip often needs to enter a deep sleep state with no clock, no power supply or a small part of power supply when there is no work task. This "suicide" power-off that cuts off its own power supply poses a challenge to the design of the wake-up circuit. Therefore, whether the wake-up circuit can operate normally is the key core of the low-power application of the entire chip. [0004] In l...

AI Technical Summary

Problems solved by technology

In the deep sleep state, the digital logic reset part is in a state of no power supply and no clock, and the traditional processing method cannot be used for edge detection. It belongs to the wake-up reset of the power-on process rather than a simple soft reset process. The processing method is difficult to implement.

[0006] In the prior art, clock-independent digital combinatorial logic is often used to wake up the circuit, but it will multiply the size of the digital code and the complexity of the digital logic, and will significantly increase the power consumption of the digital logic with constant power supply

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