基于单片机实现的移动终端电源管理设计

Implementation of Mobile Terminal Power Management Based on MCU

从硬件电路和软件程序两方面描述了一种用单片机实现手持设备电源管理设计方案:设备关机后,待机电源为掉电模式的单片机供电,使用电源开关按键产生中断实现设备开机;设备开机后,单片机和CPU模块通过串口传输控制命令和状态信息,实现外设电源的动态控制和设备关机;使用查询方式判断电源开关按键的关机动作,通知CPU模块和实现设备的强制关机.这种方法为不具备电源管理的电子产品增加此项功能提供了借鉴.

This paper describes an implementation of mobile terminal power management based on MCU from both hardware cimuit and software program. After the device powers off, the standby power works for MCU in power-down mode, and the power switch triggers interrupt to turn the device on. When the device powers on, the commands and status information are transferred through UART between MCU and CPU module to control power supply of the peripherals dynamically and turn the device off. A pall mechanism of power switch is used to inform CPU module and force the device off. This method provides a reference for adding power management to electronics products without this function.