DapLink version 0402 based on CH32

Main functions:
DAP debugger + serial to USB, dual-function
5V and 3V power output with current limiting protection.
 
Design points:
1. Uses 0402 components, single-sided component arrangement allows for economical SMT and miniaturized design.
2. Includes an external microcontroller reset button (I usually don't include a reset button on my own boards).
3. SWD, UART, and RST pins are arranged together for a more aesthetically pleasing 2*6 connector.
 
Circuit design and circuit principle:
Based on the CH32V203F6P6 chip,
it is essentially a microcontroller minimum system, so there's not much to say about that. It
features comprehensive USB interface ESD and TVS protection, and SWD and UART interface series resistor protection.
PCB layout design:
The PCB layout uses top signal layer traces + inner high-current copper pours, ensuring both aesthetics and performance.
The Type-C interface has grooves on both sides for easy gripping.
The 2*8 header uses a clamp design, requiring a 1.6mm board thickness.
SWD, UART, and RST pins are grouped together to accommodate 2*6 connectors. The 5V and 3V output pins are set up in a separate row.
DAPLink code:
Open source version based on CH32. DAPLink code
reference: GitHub - XIVN1987/DAPLink: DAPLink (CMSIS-DAP) porting to Artery AT32F425, WCH CH32V203, WCH CH32V305, Nuvoton M482 and Nuvoton M484.
 
Other:
After completion, it is recommended to use transparent heat shrink tubing for protection to prevent accidental short circuits.
If you have any questions or suggestions about the project, please leave a message for discussion.
You are also welcome to join my technical exchange group: 1016193632