PCB For WCH-LinkE Programmer

Description

PCB For WCH-LinkE Programmer

The UGE WCH-LinkE Debugger PCB is a precision-designed printed circuit board intended for building a high-performance WCH-LinkE programmer/debugger compatible with WCH’s RISC-V and ARM microcontrollers, such as the CH32V series and CH32F series.
It allows developers and students to flash firmware, debug applications, and communicate via UART, all from a compact and reliable USB-powered interface.

This version is offered as a bare PCB for DIY assembly, with well-labeled pads and an interactive BOM available for easy soldering.

Product Specifications:

• Microcontroller: CH32V305FBP6 (RISC-V4F Core)

• Supply Voltage: 5V via USB, regulated to 3.3V onboard

• Voltage Regulator: SC662 Low-Dropout LDO (3.3V, up to 500 mA)

• Fuse Protection: Resettable PPTC fuse, 0603 size, 200 mA rating

• Clock Source: 12 MHz SMD Crystal (2.5 × 1.2 mm, ±10 ppm)

• Load Capacitors: 10 pF precision ceramic capacitors

• USB Interface: USB Type-C connector (or edge-based USB pads depending on build)

• Status Indicators:

  • PWR LED – Power indicator

  • RUN/OP LED – Operation or data activity indicator

Pin Configuration:

• Mode Switch: Onboard tactile button for switching between programmer and UART bridge modes

• Jumper Option: Selects between 3.3V output and target reset configuration

Features:

• Fully compatible with WCH-LinkE firmware for debugging CH32V and CH32F devices

• Supports both SWD/JTAG and UART programming modes

• Compact and breadboard-friendly design for lab and development use

• Includes power and activity LED indicators

• Built-in current-limiting protection via PPTC fuse

• High-accuracy 12 MHz oscillator ensures stable communication

• Designed for easy DIY assembly with labeled components and an interactive BOM

Mechanical Details:

• PCB Dimensions: 50 mm × 18 mm

• Mounting: Edge slots for enclosure or USB insertion alignment

• PCB Finish: Blue solder mask, white silkscreen

• Silkscreen Labeling: All key components and pins are clearly marked for ease of assembly

• The Soldering Guide manual Diagram 

Applications:

• CH32V and CH32F microcontroller development and debugging

• RISC-V and ARM Cortex-M firmware programming

• Educational and DIY embedded projects

• UART bridge and serial communication testing

Getting Started Guide for WCH-LinkE Debugger (DIY Version)

Based on CH32V305FBP6 – Designed by UGE Electronics

1. Overview

The WCH-LinkE Debugger is a versatile programmer and debugger interface designed for WCH RISC-V and ARM microcontrollers, including the CH32V, CH32F, and CH57x families.
It provides SWD/JTAG and UART communication for programming, debugging, and serial logging.

This DIY version uses the CH32V305FBP6 MCU, SC662 3.3V regulator, and a 12 MHz crystal oscillator for reliable operation. Once assembled and flashed with official WCH-LinkE firmware, it works exactly like the factory WCH-LinkE.

2. Required Components

3. Pinout Description

4. Assembly Instructions

1. Start with small SMD components (resistors, capacitors, crystal, fuse).

2. Solder the SC662 regulator and ensure correct orientation.

3. Mount the CH32V305FBP6 MCU carefully with proper pin alignment.

4. Add the LEDs, Mode button, and USB connector.

5. Finish with header pins for programming and debugging.

6. Clean the board and visually inspect for shorts or solder bridges.

5. Flashing the Firmware

You will need another WCH-LinkE or WCH-LinkW programmer to flash the boot firmware the first time.

Steps:

1. Connect the SWD pins of your existing programmer to the CH32V305FBP6 on your new board.

   • TCK → TCK

   • TIO → TIO

   • GND → GND

   • 3.3V → 3.3V

2. Open MounRiver Studio on your PC (download from wch.cn).

3. Import the WCH-LinkE firmware (available in WCH’s official SDK).

4. Flash the firmware into your CH32V305FBP6.

5. Once done, disconnect and power via USB — it should enumerate as WCH-LinkE on your computer.

6. Driver Installation

🔸 Windows:

• Download and install WCH USB Driver Package from:
  🔗 https://www.wch.cn/downloads/WCHISPTool_Setup_exe.html

• Plug in your WCH-LinkE board via USB.

• It should appear under Device Manager → Ports (COM & LPT) as:
  WCH-LinkE (COMx)

 Linux/Mac:

• Most modern kernels recognize it automatically.

• Use dmesg | grep tty to confirm.

7. Testing the Connection

1. Open MounRiver Studio.

2. Go to Debug Configurations → WCH-LinkE.

3. Connect a target board (e.g., CH32V103).

4. Click Detect — it should identify the MCU.

5. You can now program or debug your target device.

8. Operating Modes

9. LED Indicators

10. Applications

• Debugging CH32V, CH32F, and CH573 MCUs

• Flash programming for RISC-V and ARM devices

• USB to UART serial communication

• Educational and DIY RISC-V development

• Replacement or clone of factory WCH-LinkE