Loading source-backed pinouts…
Microcontroller · Development Board
STM32 Nucleo-F103RB
A classic STM32F1 Nucleo-64 board with integrated ST-LINK and both Arduino Uno R3 and ST Morpho expansion connectors.
Processor
STM32F103RB Arm Cortex-M3
Logic
3.3 V GPIO
Power
USB, VIN/E5V/3V3 headers
Format
Nucleo-64 with Arduino Uno + ST Morpho headers
Check before wiring
- Arduino header map is generic Nucleo-64; use ST UM1724 and schematics for exact Morpho pin names.
- GPIO is 3.3 V; 5 V Arduino shields need electrical compatibility checks.
- Solder bridges and alternate functions affect clock, serial, and debug routing.
- STM32F103 peripheral muxing differs from newer Nucleo F4/L4/G0 examples.
Interfaces
GPIOI2CSPIUARTADCPWMCANUSBSWD
Source-backed connector
Interactive pin map
Pin map
Connector
STM32 Nucleo-64 Arduino Uno R3 headers
Component side up, Arduino + Morpho headers on the long edges
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
Hover, tap, or focus a pad to inspect a pin. Use arrow keys to move between pins.
- Models the Arduino-compatible CN5/CN6/CN8/CN9 headers documented in ST UM1724.
- MCU pin names vary by Nucleo-64 board; use the board manual/schematic for ST Morpho CN7/CN10 assignments.
- GPIO logic is 3.3 V unless the specific board documentation says otherwise.
All 32 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| CN5/CN9 digital | ||||
| 1 | UART | UART | ||
| 2 | UART | UART | ||
| 3 | GPIO | |||
| 4 | PWM | |||
| 5 | GPIO | |||
| 6 | PWM | |||
| 7 | PWM | |||
| 8 | GPIO | |||
| 9 | GPIO | |||
| 10 | PWM | |||
| 11 | SPI | SPI | ||
| 12 | SPI | SPI | ||
| 13 | SPI | SPI | ||
| 14 | SPI | SPI | ||
| 15 | Ground | GND | ||
| 16 | Power | AREF | ||
| 17 | I2C | I2C | ||
| 18 | I2C | I2C | ||
| CN6/CN8 power and analog | ||||
| 18 | Reserved | |||
| 19 | Power | IOREF | ||
| 20 | System | |||
| 21 | Power | 3V3 | ||
| 22 | Power | 5V | ||
| 23 | Ground | GND | ||
| 24 | Ground | GND | ||
| 25 | Power | VIN | ||
| 26 | ADC | |||
| 27 | ADC | |||
| 28 | ADC | |||
| 29 | ADC | |||
| 30 | ADC | |||
| 31 | ADC | |||
Why it matters
- Official ST product page lists Arduino Uno V3 and ST Morpho connectivity.
- Good low-cost board for STM32F1 peripheral and legacy library testing.
- Integrated ST-LINK provides debugging, programming, and virtual COM support.
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