1. Functional Features

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.

Red and blue LED indicators for easy viewing of working status.

Directly marked on the interface definition board for ease of use.

Support for automatic firmware detection and upgrade.

Support for one‐button switching of RISC‐V/ARM mode by the host computer.

Use the transparent case to protect the motherboard, easy to carry.

2. Function introduction

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. 3. Hardware description Pin Definition 4. Instructions for use

SWD connection method USB to TTL serial port connection

Mode switching:

Way 1: Use MounRiver Studio software to switch WCH-LinkE mode

Power up the WCH-LinkE, open MounRiver Studio, and enter the download configuration

Select the target mode and apply

Notes:

1 is to select the target mode

2 is to query the current mode

3 is to set the target mode

Way 2: Use WCH-LinkUtility tool to switch WCH-LinkE mode

Power up WCH-LinkE and open WCH-LinkUtility tool

Select the target mode and apply

Way 3: Use ModeS key to switch WCH-LinkE mode (WCH-LinkE-R0-1v2 only)

Press and hold the ModeS key to power up until the status indicator lights up to complete the mode switch.

Notes:

When downloading and debugging, the blue LED flashes

WCH-LinkE maintains the switched mode when used subsequently

WCH-LinkE high-speed version only for CH32F20x/CH32V20x/CH32V30x to speed up

5. Specifications

erial port default parameters

Data bit: 8

Stop bit: 1

Checksum bit: None

Flow control: None