Serial port circuit design

Using the Type-C interface of the development board, you can download the program to the development board through the serial port burning software FlyMCU; in addition, you can also view the data through the serial port for debugging and other functions later.

Serial port circuit

The serial port chip used by the development board is CH340K, and its main function is to convert the USB interface to a serial port (UART) interface.

The computer and the development board cannot communicate directly through USB, and need to use USB to serial port for communication