4 layers
Rpdap
rubenbaldewsing/RPDAP
CMSIS-DAP SWD/JTAG/UART debugger hardware based on a Raspberry Pi RP2040 microcontroller
54 parts1MIT
4 layers35.8 × 38.2 mm
Rpdap compact
rubenbaldewsing/RPDAP1CMSIS-DAP SWD/JTAG/UART debugger hardware based on a Raspberry Pi RP2040 microcontroller
- Size
- 35.8 × 38.2 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 76
- Pads
- 264
- Tracks, vias
- 492, 113
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 Aug 2024
- Updated
- 16 Oct 2025
Overview
Rpdap compact is an open-source printed circuit board by rubenbaldewsing, from the rubenbaldewsing/RPDAP repository on GitHub, published under the MIT licence. It is a 4-layer board of 35.8 × 38.2 mm with 63 parts on 76 nets, routed with 492 tracks and 113 vias.
Its parts include 31 capacitors, 10 resistors, 10 ICs, 4 diodes and 2 connectors. It belongs with the interfaces and adapters boards of this library.
README
README.mdRPDAP
CMSIS-DAP debugger hardware based on a Raspberry Pi RP2040 microcontroller.
About
This project contains the hardware designs for a RP2040 based CMSIS-DAP debugger running the free-dap firmware.
This project is build with atopile.
Features
- USB interface (data and power)
- status LEDs for VCP (Virtual COM Port), DAP status, and power.
- level shifted target interface (SWD, UART)
- 1.2-5.5V target logic voltage
Layouts
There are various layouts and standalone boards available:
 | |
|---|---|
| Basic layout without connectors (for inclusion in your own design/PCBA) | Standalone stick shaped layout with female USB Type-C, Cortex-M debug header and 4-pin JST-SH UART connector. All inside a PCB enclosure. |
 |  |
| Standalone RPDAP Compact board (JLink Base Compact compatible board shape) | JLink Base Compact compatible "footprint" (for using as build-in debugger/programmer) |
Firmware
The firmware for the debugger is available in the free-dap repository. Follow this standard RP2040 flashing procedure to flash the firmware.
Enclosures
This RPDAP Stick has a build in enclosure in the design (part of the PCB), and the RPDAP Compact board has a 3D printable enclosure available.
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 26 | 100nF ±10% 16V X7R | Samsung_Electro_Mechanics_CL05B104KO5NNNC:C0402 | C1, C2, C10, C11, C12, C13, C14, C17, C18, C22, C23, C24, C25, C26, C27, C29 +10 |
| 7 | Wuxi_I_core_Elec_AiP74LVC1T45GB236_TR:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | U1, U3, U4, U5, U6, U7, U8 | |
| 4 | 10kΩ ±1% 62.5mW | UNI_ROYAL_0402WGF1002TCE:R0402 | R2, R3, R5, R6 |
| 3 | 2.2µF ±10% 16V X5R | Samsung_Electro_Mechanics_CL05A225KO5NQNC:C0402 | C16, C21, C28 |
| 2 | ALPSALPINE_SKRPACE010:KEY-SMD_4P-L4.2-W3.2-P2.20-LS4.6 | SW1, SW2 | |
| 2 | Hubei_KENTO_Elec_KT_0603R:LED0603-RD | LED1, LED2 | |
| 2 | 15pF ±5% 50V C0G | FH_0402CG150J500NT:C0402 | C19, C20 |
| 2 | 1kΩ ±1% 62.5mW | UNI_ROYAL_0402WGF1001TCE:R0402 | R1, R4 |
| 2 | 27Ω ±1% 62.5mW | UNI_ROYAL_0402WGF270JTCE:R0402 | R7, R8 |
| 2 | 5.1kΩ ±1% 62.5mW | UNI_ROYAL_0402WGF5101TCE:R0402 | R9, R10 |
| 1 | Abracon_LLC_ABM8_272_T3:CRYSTAL-SMD_4P-L3.2-W2.5-BL | X1 | |
| 1 | Winbond_Elec_W25Q128JVSIQ:SOIC-8_L5.3-W5.3-P1.27-LS8.0-BL | U10 | |
| 1 | STMicroelectronics_USBLC6_2SC6:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | D1 | |
| 1 | Raspberry_Pi_RP2040:LQFN-56_L7.0-W7.0-P0.4-EP | U9 | |
| 1 | SHOU_HAN_TYPE_C_16PIN_2MD_073:USB-C-SMD_TYPE-C-6PIN-2MD-073 | USB1 | |
| 1 | BHFUSE_BSMD0805_050_15V:F0805 | F1 | |
| 1 | Hubei_KENTO_Elec_Blue_light_0603:LED0603-RD | LED3 | |
| 1 | HCTL_HC_1_0_4PWT_B_HW:CONN-SMD_4P-P1.00_HCTL_HC-1.0-4PWT | CN1 | |
| 1 | atopile_Logo_25x6mm:atopile_Logo_25x6mm | LOGO1 | |
| 1 | Megastar_ZX_IDC2_54_2_10PWZ:IDC-TH_20P-P2.54_ZX-IDC2.54-2-10PWZ | J1 | |
| 1 | TECH_PUBLIC_TPAP2112K_3_3TRG1:SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BR | U2 |
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rubenbaldewsing/RPDAP
CMSIS-DAP SWD/JTAG/UART debugger hardware based on a Raspberry Pi RP2040 microcontroller
4 parts1MIT
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Questions
How big is the Rpdap compact PCB?
It measures 35.8 × 38.2 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Rpdap compact use?
63 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Rpdap compact KiCad files?
From the rubenbaldewsing/RPDAP repository on GitHub, at the commit this page was made from: the board is layouts/rpdap_compact/rpdap_compact.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rpdap compact design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).