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Microcontroller · Development Board
STM32 Nucleo-G431KB
Breadboard-friendly Nucleo-32 with an ST-LINK debugger and Arduino Nano pinout.
- GPIO
- I2C
- SPI
- UART
- ADC
- PWM
- USB
- SWD
- CAN
- DAC
- Processor
- STM32G431KB Arm Cortex-M4 @ 170 MHz
- Logic
- 3.3 V MCU IOTreat as not 5 V tolerant
- Power
- USB, VIN, 5 V, 3.3 V rail
- Format
- Nucleo-32 in the Arduino Nano footprint
Before you wire
3 cautions- Pin functions depend on solder bridges and alternate functions.
- D5 and D4 are PA15 and PB7; solder bridges also tie them to A5 and A4. Check SB2 and SB3.
- Mbed lists A4 as PB7, A5 as PA15, and D13 as PB3, and notes PA5, PA6, and PB8 from ST's manual. This map uses the manual's pins; check the solder bridges on your board.
Pin map
Connector
STM32 Nucleo-32 Arduino Nano headers (CN3, CN4)
USB at top, component side up, headers on both long edges
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
Pin
Hover, tap, or arrow to a pad to inspect it.
- Models the Arduino Nano V3 pin layout of the Nucleo-32 CN3 and CN4 headers. Each map was matched row by row against stm32duino and Mbed OS.
- MCU pin names vary by board. Some pads are joined or opened by solder bridges; check the board manual.
- GPIO logic is 3.3 V unless the specific board documentation says otherwise.
All 30 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| 1 | UART | UART | TX | |
| 2 | UART | UART | RX | |
| 3 | System | |||
| 4 | Ground | GND | ||
| 5 | GPIO | |||
| 6 | GPIO | |||
| 7 | GPIO | |||
| 8 | GPIO | |||
| 9 | GPIO | |||
| 10 | GPIO | |||
| 11 | GPIO | |||
| 12 | GPIO | |||
| 13 | GPIO | |||
| 14 | GPIO | |||
| 15 | GPIO | |||
| 16 | GPIO | |||
| 17 | Power | 3V3 | ||
| 18 | Alt | |||
| 19 | ADC | |||
| 20 | ADC | |||
| 21 | ADC | |||
| 22 | ADC | |||
| 23 | ADC | |||
| 24 | ADC | |||
| 25 | ADC | |||
| 26 | ADC | |||
| 27 | Power | 5V | ||
| 28 | System | |||
| 29 | Ground | GND | ||
| 30 | Power | VIN |
Source references
Docs
Why it matters
- Arduino Nano layout on a breadboard-friendly board.
- Integrated ST-LINK debugger.
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