A button wake-up system and its working method

Abstract

This invention discloses a button wake-up system and its operating method, relating to the field of high-end meters and terminals using Linux system solutions. It includes a backup power module for supplying power to the wake-up system; a system power conversion module for stepping down and converting the voltage from the backup power module to the operating voltage required by the wake-up system and the voltage required by the second control module; a MOS switch module for controlling the connection and disconnection between the backup power module and the system power module; a first control module for receiving button signals and controlling the conduction or cutoff of the circuit in the MOS switch module; a second control module for receiving a high or low level output from the backup power control network and controlling the conduction or cutoff of the circuit in the MOS switch module; and a main control module for controlling the high or low level output from the backup power control network and acting on the second control module. The system has few circuit components and occupies little PCB space, offering the advantage of high wake-up stability.

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