一种新型的掉电检测方法

针对常用掉电检测电路误判发生概率大，实时性差等缺点，给出了一种简单、可靠、适用于单片机系统的掉电检测电路。此种方法利用TLP521可控制的光电耦合器，通过外部中断的反应通知单片机及时地保存需要保存的数据，详细介绍了掉电检测电路的原理。实践证明，该电路能够快速有效地检测到掉电情况的发生。

A New Kind of Brown-out Detection Method

Aiming at the disadvantages of common brown-out detection program,for example,the probability of misjudgment of electricity dropping is large,and its speed is slow. A simple and reliable power-off detecting circuit is given in this paper.This method uses photoelectric coupler that can be control by TLP521.And microcontroller is noticed to save the data that needs to be saved through external interrupt timely.Brown-out detection circuit principle is introduced. Practice has proved that the circuit is able to detect the occurrence of power-off situation quickly and efficiently.