Universal serial bus (USB) composite equipment of universal microprogrammed control unit (MCU) and data distribution and equipment debugging method

The invention provides a universal MCU (Microprogrammed Control Unit) USB (Universal Serial Bus) composite device and a data distribution and device debugging method, through a design method of the USB composite device, a single USB interface is provided to realize a plurality of independently identified USB devices, and the plurality of USB devices identified by the single interface respectively realize different functions. A plurality of USB devices such as a special USB communication interface, a virtual serial port (VCP) for device debugging, a USB flash disk for data downloading and the like, definitions and attributes of the plurality of USB devices and electronic information carried by the USB devices can be modified and updated through MCU firmware upgrading, through the design, product data and software distribution without paper, optical discs and USB flash disk media is achieved, and through the design, the product data and software distribution efficiency is improved. Product data and software dis