The WCH-Link Emulator CMSIS-DAP Type-C Debug RISC-V ARM SWD TTL Programmer is a compact, high-performance debugging and downloading tool designed for developers working with Qinheng RISC-V and ARM Cortex-M microcontrollers. It supports seamless switching between RISC-V mode and ARM CMSIS-DAP mode, offering broad compatibility for embedded development, firmware testing, software debugging, and serial communication.

Equipped with a Type-C USB interface, dual power output, SWD interface, and TTL UART support, the WCH-Link provides a reliable and convenient solution for MCU programming and debugging. Its transparent protective casing ensures durability while remaining lightweight and easy to carry for fieldwork or lab development.

This WCH-Link emulator is built to provide a stable, user-friendly debugging experience for embedded engineers, students, and hobbyists. It supports CMSIS-DAP protocol, making it compatible with ARM debugging tools, IDEs, and firmware development environments.

With support for 3.3V and 5V power output, it can power target boards directly, simplifying the development setup. The tool also includes TTL serial communication, allowing developers to monitor logs, debug information, and UART output across various baud rates.

The module can be easily firmware-upgraded by shorting the ISP2 pads, enabling direct updates through USB for long-term usability. Its small transparent shell provides protection while keeping the device portable and visually appealing.

Features:

• Supports Qinheng RISC-V and ARM Cortex-M kernels with easy mode switching.

• Fully compatible with CMSIS-DAP in ARM mode.

• Provides dual power output: 5V and 3.3V for powering target boards.

• Equipped with Type-C USB interface for reversible, convenient connection.

• Supports SWD debugging interface for ARM MCUs.

• Features a TTL serial port, compatible with wide baud rate ranges for viewing logs and debugging info.

• Transparent protective casing, compact and portable.

• Supports firmware upgrade by shorting ISP2 solder pads.

• Strong PCB-level build quality for long durability.

• Ideal for embedded development, field testing, firmware flashing, and lab debugging.

• Easy to integrate with common development boards, IDEs, and programming tools.

Supported Microcontrollers:

• CH32V003 — Ultra‑low cost RISC‑V MCU (very common in hobby projects)

• CH32V10x series — Widely used for general‑purpose embedded projects

• CH32V20x series — Mid‑range with more flash/peripherals

• CH32V30x series — Higher‑performance variant

• CH32V317 / CH32M007 / similar — Other members in CH32V/CH32M RISC‑V line

• CH569 / CH573 / CH583 — WCH chips with mixed‑function (UART/SPI/I2C etc.)

• STM32F10x series (Cortex‑M3) — e.g., STM32F103C8T6 — very common in DIY/Pro boards

• STM32F20x, F3, F4, etc. — any Cortex‑M with SWD/JTAG should work with proper IDE support

• Other ARM Cortex‑M series from vendors like NXP, Nordic — works as long as IDE supports CMSIS‑DAP

and many more...

How to Use:

• Connect the debugger to your PC using a USB Type-C cable.

• Select RISC-V or ARM CMSIS-DAP mode depending on your target MCU.

• Attach SWD pins to the target board:

  • SWCLK → Target SWCLK

  • SWDIO → Target SWDIO

  • GND → Target GND

  • 3.3V / 5V → Target power if needed

• Connect RX/TX pins if using TTL UART:

  • RX → Target TX

  • TX → Target RX

• Open your preferred IDE or flashing tool and select CMSIS-DAP or WCH debugger interface.

• For firmware upgrade: short the ISP2 pads and connect via USB to update.

Resources:

• MounRiver Studio access website: http://mounriver.com/
• WCH-LinkUtility access website:https://www.wch.cn/downloads/WCH-LinkUtility_ZIP.html
• WCHISPTool access website: https://www.wch.cn/downloads/WCHISPTool_Setup_exe.html
• WCH-Link information website: https://www.wch.cn/products/WCH-Link.html

Product Instructions:

• Ensure correct pin alignment before powering.

• Avoid reversing RX/TX connections.

• Use only regulated 3.3V or 5V output for powering MCUs.

• Keep the protective cover on for safe handling.

• Install necessary WCH drivers and debugging tools for best performance.

• Do not connect both 3.3V and 5V outputs simultaneously.

Pin Definition:

Module Pin | Target Board Connection | Description
5V | 5V | Supplies 5V to target
3V3 | 3.3V | Supplies 3.3V to target
GND | GND | Common ground
SWCLK | SWCLK | ARM SWD clock
SWDIO | SWDIO | ARM SWD data
RX | TX | Receive from MCU
TX | RX | Transmit to MCU

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