介绍一种微计算机应用控制中断电保护电路的设计，该设计主要是利用镉镍蓄电池的特性，在市电突然断电情况下，为微机应用控制系统中的 Ｒ Ａ Ｍ 存贮芯片提供电源，从而达到保护 Ｒ Ａ Ｍ 存贮器中的数据信息不丢失的目的．此断电保护电路已在通过部级鉴定的微机控制的整机产品中使用 This paper introduces the design of microcomputer control interrupt power protection circuit. The design mainly uses the characteristics of nickel-cadmium storage battery to supply power to R A M memory chip in microcomputer application control system under the condition of sudden power failure , So as to achieve the purpose of protecting the data information in the ROM without losing the data. This power-off protection circuit has been used in the microcomputer-controlled machine that passed the ministerial-level authentication