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STM32 Nucleo-64 (F401RE): specs and pinout

ST NUCLEO-F401RE: an STM32F401RET6 board with an on-board ST-LINK/V2-1 debugger, Arduino Uno-style connectors and ST Morpho headers.

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Specs

Power

Pinout

Rows are the Arduino connectors CN5, CN6, CN8 and CN9 from UM1724 Rev 9 Table 15. The ST Morpho connectors CN7 and CN10 carry more pins (Table 27) and are not listed beyond the power pins and PC13. Rows are from UM1724 Rev 9 (Aug 2015).

Build with it

Project ideas for the STM32 Nucleo-64 (F401RE). Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.

• A temperature and pressure logger over serial with an STM32 Nucleo-64 F401RE and a BME280 sensor module: The Nucleo I2C1 lines are D14 (SDA) and D15 (SCL) at 3.3 V logic. The stocked BME280 module is listed as a 5 V version and its supply and logic levels are not documented here: check the module before connecting it to the 3.3 V pins. Readings go to the ST-LINK virtual serial port.
• A potentiometer controlled servo sweeper with an STM32 Nucleo-64 F401RE, a 10k potentiometer and an SG90 servo: The potentiometer wiper goes to ADC pin A0 (3.3 V supply); the servo signal goes to a timer pin such as D5. Power the servo from its own 5 V supply with grounds joined, since the board's 5 V comes from USB or VIN with limited current.
• A desk clock that shows time from a DS3231 on a 0.96 inch OLED with an STM32 Nucleo-64 F401RE: Both modules share the I2C1 bus on D14 and D15 at 3.3 V; check each module's address and that its pull-ups and supply suit 3.3 V.
• A tilt angle readout over serial with an STM32 Nucleo-64 F401RE and an MPU6050 module: The MPU6050 module talks I2C on D14 and D15; running it from 3.3 V keeps the logic levels the same as the board.

Common mistakes

• Feeding 5 V logic into the I/O pins: UM1724 states the board I/Os are 3.3 V compatible, not 5 V like the Arduino Uno, so do not rely on 5 V tolerance on shields (source: link, Arduino connectors, p.30)
• Supplying VIN outside 7 V to 12 V, or drawing more than the limit for your input voltage (250 mA at 9-12 V) (source: link, Table 6, p.15)
• Powering the board through +3V3 while the ST-LINK is still connected: the ST-LINK is then unpowered, so programming and debug stop working (source: link, section 5.3.3, p.17)

Not covered by the official source

• Values are from UM1724 Rev 9 (2015) and are not compared with newer revisions.
• Morpho connector rows (CN7, CN10) other than power and PC13 are not given on this page.
• The A4/A5 pin choice depends on solder bridges (Table 9); defaults are not stated here.
• CPU speed, memory size, MCU supply range and temperature range are not given here. See the ST STM32F401xD/xE datasheet.

Sources

• link (UM1724 STM32 Nucleo-64 boards user manual, DocID025833 Rev 9, Aug 2015)