Support online downloading and debugging of WCH RISC‐V architecture MCU and ARM chips with SWD interface, with two‐wire interface, fast speed and stable operation. Support 3.3/5V dual power output. WCH‐LinkE module, can be used for online downloading and debugging of WCH RISC‐V architecture MCU and ARM chips with SWD interface. It is connected to the host computer via USB2.0 full-speed interface for plug‐and‐play driver‐free installation and connected to the target chip by SWD interface for debugging and programming. Also with 1 way serial port for easy debugging output. Red and blue LED indicators for easy viewing of working status. Directly marked on the interface definition board for ease of use.