CH32V203-DevBoard
21km43·CH32V203-DevBoard
About the CH32V203-DevBoard PCB
CH32V203-DevBoard is an open source STM32 PCB design by 21km43, published on GitHub under the MIT license. It is a 2-layer board measuring 20.3 × 50.8 mm, with 35 components from 17 distinct parts.
Its main chip is the CH32V203C8T6, from the STM32 family. Other key parts include the XC6206P332MR. By type, the board carries 12 capacitors, 10 resistors, 3 switches, 2 ICs, 2 connectors and 2 diodes.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
CH32V203 Development board

Main components on the CH32V203-DevBoard
CH32V203-DevBoard bill of materials (BOM)
35 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CH32V203C8T6 | LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | XC6206P332MR | SOT-23-3 | U2 |
| 2 | USB_C_RECEPTACLE_USB2.0_16P USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J1, J2 |
| 3 | SW_Push | SW_SPST_PTS810 | SW1, SW2, SW3 |
| 1 | 32.768KHZ 32.768KHz | Crystal_SMD_3215-2Pin_3.2x1.5mm | XTAL1 |
| 1 | 8MHZ 8MHz | Crystal_SMD_5032-2Pin_5.0x3.2mm | XTAL2 |
| 1 | LED | LED_0603_1608Metric | LED1 |
| 1 | 1N5819WS | D_SOD-323 | D1 |
| 1 | C37704 BAT54C,215 | SOT-23 | D2 |
| 1 | C1002 FerriteBead | L_0603_1608Metric | FB1 |
| 2 | 15PF 15pF | C_0402_1005Metric | C1, C2 |
| 2 | 22PF 22pF | C_0402_1005Metric | C3, C4 |
| 6 | 100NF 100nF | C_0402_1005Metric | C5, C6, C7, C8, C9, C10 |
| 2 | 1UF 1uF | C_0603_1608Metric | C11, C12 |
| 3 | 10kΩ | R_0402_1005Metric | R1, R2, R8 |
| 5 | 5.1kΩ | R_0402_1005Metric | R3, R4, R5, R10, R11 |
| 2 | 56kΩ | R_0603_1608Metric | R6, R7 |
CH32V203-DevBoard design files
The KiCad project lives in the 21km43/CH32V203-DevBoard repository on GitHub; these links point at the commit this page was built from.
- LayoutCH32V203-DevBoard.kicad_pcb
- SchematicCH32V203-DevBoard.kicad_sch
- BOMproduction/bom.csv
CH32V203-DevBoard: common questions
What microcontroller does the CH32V203-DevBoard use?
The CH32V203-DevBoard is built around the CH32V203C8T6, from the STM32 family.
How big is the CH32V203-DevBoard PCB?
The CH32V203-DevBoard measures 20.3 × 50.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the CH32V203-DevBoard?
35 components, from 17 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the CH32V203-DevBoard design files?
From the 21km43/CH32V203-DevBoard repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the CH32V203-DevBoard design in my own project?
Yes, under the terms of its MIT license, which 21km43 chose for the repository.
Can I test firmware for the CH32V203-DevBoard without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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