摘要
介绍了利用８０３１单片机制作的后备式方波ＵＰＳ电源的硬件组成和软件设计，其特点是电路结构简化，多方面提高了电源性能，增强了适用性。
The hardware composition and software design of the reserved mode square wave UPS based on 8031 chip is discussed and the system features with simplified circuit design ,improved performance from diverse aspects,expanded fitness,and the total production cost is basically the same.
关键词
UPS电源
单片机
UPS system,single chip micro computer
