Mcu wake-up circuit and electronic device

By using a switching unit composed of capacitors and transistors to provide a high level to the MCU's power control pins, the problem of the MCU being unable to sleep in charging mode is solved, enabling intelligent wake-up and sleep switching and improving the user experience.

CN224553746UActive Publication Date: 2026-07-24HEFEI IFLYTEK TOYCLOUD TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HEFEI IFLYTEK TOYCLOUD TECH
Filing Date
2025-06-06
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing MCU wake-up circuit cannot put the MCU back into sleep mode via the power button in charging mode, resulting in a reduced user experience.

Method used

The switching unit, composed of capacitors, switching components, NPN and PNP transistors, provides a high level to the MCU's power control pins instantaneously via the charging cable and automatically returns to a low level after charging is complete, making the power button controllable.

Benefits of technology

The MCU can be woken up the moment the charging cable is connected and can be controlled to enter sleep mode after charging is completed, which improves the user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides an MCU wake-up circuit and an electronic device, and relates to the technical field of circuits. Through a switch component, a high level can be provided for a power control pin by using a normal power supply at the moment when a first end of a capacitor is connected with a charging line, so that the MCU is woken up at the moment when the charging line is connected, and the power control pin can automatically return to a controllable low level state, thereby avoiding the power control pin being continuously high. After that, the power button can be pressed to wake up or sleep the MCU, intelligent switching of the charging line control and the power button control is realized, the problems that the power button is invalid and the MCU cannot enter a sleep mode due to the charging voltage continuously keeping the power control pin of the MCU high in the prior art are solved, and the use experience of users is improved.
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