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The RP2350-ProMini project aims to create a replacement for the Arduino Pro Mini using the RP2350 MCU.
The RP2350-ProMini board is a 4-layer board designed to accommodate the popular Raspberry Pi RP2350 MCU in the commonly used, but obsolete, Arduino Pro Mini footprint.
This project is a shoot-off from my earlier RP2040-ProMini project, which was designed to accommodate the Raspberry Pi RP2040 MCU in the same footprint.
Preview:
You can view the Schematics in PDF format for detailed information.
STEP 3D files are available with pins and without pins.
Features:
- Arduino Pro Mini compatible pinout
- Partially compatible with Arduino Nano RP2040 Connect pinout
- Detachable USB and JTAG extension board with RESET button
- Dual-core Cortex-M33 Raspberry Pi RP2350
- Small footprint suitable for DIY projects
- 21 GPIO pins, including 4 analog inputs
- USB data pins on the side connector
- SWD debugging pins on the side connector
- Buck-Boost converter based 3.3V power supply with input range of 2.5V-12V
- Supports both SOIC and WSON 16MB flash packages
- Flat back side enables use as a sub-assembly
- Two cut points to reduce power consumption of unused components
CAM files, as well as the BOM and CPL files for JLCPCB, are available.
Following pinout is used for the board:
| Board Pin | RP2040 Pin | Function | Notes |
|---|---|---|---|
| D0 | GPIO1 | UART0 TX | |
| D1 | GPIO0 | UART0 RX | |
| D2 | GPIO25 | ||
| D3 | GPIO15 | ||
| D4 | GPIO16 | ||
| D5 | GPIO17 | ||
| D6 | GPIO18 | ||
| D7 | GPIO19 | ||
| D8 | GPIO20 | ||
| D9 | GPIO21 | ||
| D10 | GPIO5 | SS | |
| D11 | GPIO7 | MOSI | |
| D12 | GPIO4 | MISO | |
| D13 | GPIO6 | SCK | LED |
| D14 A0 | GPIO26 | ||
| D15 A1 | GPIO27 | ||
| D16 A2 | GPIO28 | ||
| D17 A3 | GPIO29 | ||
| D18 | GPIO12 | SDA | |
| D19 | GPIO13 | SCL | |
| D20 | GPIO22 | ||
| D21 | GPIO23 |
There are two cut points on the board to reduce power consumption of unused components.
| Cut Point | Function | Notes |
|---|---|---|
| CUT_VIN | Separates VIN-to-3V3 power supply with power LED from the rest of the board | This cut point is useful if you want to power the board from 3V3 pin instead of VIN pin. |
| CUT_LED | Separates LED on pin D13 from the rest of the board | This cut point is useful if you want to reduce power consumption of the board. |
Initial release for testing purposes.
- Raspberry Pi RP2350 information page.
- Arduino Pro Mini information page.
- Arduino Nano RP2040 Connect page.
- Arduino SDK for RP2040/RP2350 board.
Your contributions as code, resources, or finances are welcome! Please contact me directly via email at [email protected] or through my GitHub profile.
If you'd like to make a financial contribution, you can donate via PayPal or Ko-Fi. Your support is greatly appreciated.
Thanks in advance!
