Single-chip microcomputer power failure detection and data power failure storage circuit

The utility model belongs to the technical field of electronic circuits, and particularly relates to a singlechip power failure detection and data power failure storage circuit, which comprises an MCU (Microprogrammed Control Unit), a FLASH memory, a power supply chip U1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2, a resistor R3, a resistor 4, a switch Q1 and a diode D1, compared with the prior art, the time when the energy storage capacitor starts to be charged can be controlled through RC delay, a power supply system cannot be influenced, the normal starting time of the system cannot be influenced even if the energy storage capacitor is high in capacity, the cost is low, and power failure detection and data power failure storage of the single chip microcomputer can be achieved. 本实用新型属于电子电路技术领域，尤其涉及一种单片机掉电检测与数据掉电保存电路，包括MCU、FLASH存储器、供电芯片U1、电容C1、电容C2、电容C3、电阻R1、电阻R2、电阻R3、电阻4、开关Q1及二极管D1；与现有技术相比，本实用新型可以通过RC延时来控制储能电容开始充电的时间，不会对电源系统造成影响，即便是大容量储能电容也不会影响系统正常开机启动时间，成本低廉，并能实现单片机掉电检测与数据