节电设计中掉电状态MCU的复位唤醒速度

Speed of reset to terminate the power- down mode of microcontroller in power saving design

针对采用掉电方式进行MCU节电设计时能否用硬件复位实现快速唤醒,分析讨论了上电复位、运行复位和掉电复位等三类复位方式的一些区别和特点,得出了掉电复位唤醒所需时间远小于上电复位、复位信号应维持多宽方能快速唤醒MCU、以及采用片外时钟可使复位唤醒速度最快等结论。

How to use hardware reset to fast terminate the power-down mode of mieroeontroller is important for such power saving design. It is discussed that what the differences are among the three reset modes of power-on, running, and powerdown. And it is concluded that the reset time taken by terminating the power-down mode is less than the time taken by power-on, and how long the reset signal should be held to implement fast terminating of the power-down mode, and using external clock is the fastest way to terminate the power-down mode of mieroeontroller.