針對采用掉電方式進(jìn)行MCU 節(jié)電設(shè)計時能否用硬件復(fù)位實現(xiàn)快速喚醒，分析討論了
上電復(fù)位、運行復(fù)位和掉電復(fù)位等三類復(fù)位方式的一些區(qū)別和特點，得出了掉電復(fù)位喚醒所需時間遠(yuǎn)小于上電復(fù)位、復(fù)位信號應(yīng)維持多寬方能快速喚醒MCU、以及采用片外時鐘可使復(fù)位喚醒速度最快等結(jié)論。
關(guān)鍵詞：快速喚醒；節(jié)電設(shè)計；掉電方式；單片機(jī)應(yīng)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