節(jié)電設計中掉電狀態(tài)MCU的復位喚醒速度

針對采用掉電方式進行MCU 節(jié)電設計時能否用硬件復位實現(xiàn)快速喚醒，分析討論了
上電復位、運行復位和掉電復位等三類復位方式的一些區(qū)別和特點，得出了掉電復位喚醒所需時間遠小于上電復位、復位信號應維持多寬方能快速喚醒MCU、以及采用片外時鐘可使復位喚醒速度最快等結論。
關鍵詞：快速喚醒；節(jié)電設計；掉電方式；單片機應用
Abstract: How to use hardware reset to fast terminate the power-down mode of microcontroller is mportant for such power saving design. It is discussed that what the differences are among the hree reset modes of power-on, running, and power-down. And it is concluded that the reset time aken by terminating the power-down mode is less than the time taken by power-on, and how long he reset signal should be held to implement fast terminating of the power-down mode, and using xternal clock is the fastest way to terminate the power-down mode of microcontroller.
Key words: fast terminate the power-down mode; power consumption reduction; power-down
mode; microcontroller application