L298N with NUCLEO-F401RE

Wiring for the L298N dual motor driver on the NUCLEO-F401RE (STM32F401RE, 3.3 V logic), chosen with the same pin rules BoardPilot uses: default buses first, and no pins that are used for flash, USB, the debugger or booting.

Wiring

L298N pin	Role	NUCLEO-F401RE pin	Notes
ENA	Input to the part	D2 (PA10)	Motor A speed (PWM). Remove the jumper to use it
IN1	Input to the part	D4 (PB5)	Motor A direction
IN2	Input to the part	PWM/D5 (PB4)	Motor A direction
IN3	Input to the part	PWM/D6 (PB10)	Motor B direction
IN4	Input to the part	D7 (PA8)	Motor B direction
ENB	Input to the part	D8 (PA9)	Motor B speed (PWM). Remove the jumper to use it
12V	Not wired to the board	not connected	Motor supply 5 to 35 V from a separate supply
GND	Ground	GND
5V	Not wired to the board	not connected	5 V output of the on-board regulator (jumper on, supply up to 12 V)
OUT1	Not wired to the board	not connected	Motor A
OUT2	Not wired to the board	not connected	Motor A
OUT3	Not wired to the board	not connected	Motor B
OUT4	Not wired to the board	not connected	Motor B

Check before you power it on

Motors, servos, relays and LED strips can draw more current than the NUCLEO-F401RE’s pins or USB can give. Power them separately and connect the grounds together.

Test code (Arduino)

// Motor A: ENA = speed (PWM), IN1/IN2 = direction. Remove the ENA jumper on the module.
void setup() {
  pinMode(PB5, OUTPUT);
  pinMode(PB4, OUTPUT);
  pinMode(PA10, OUTPUT);
}

void loop() {
  digitalWrite(PB5, HIGH);
  digitalWrite(PB4, LOW);
  analogWrite(PA10, 180);  // about 70% speed
  delay(2000);
  analogWrite(PA10, 0);    // stop
  delay(1000);
}

Arduino board: STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F401RE. Plug the USB cable into the mini-USB port on the ST-LINK end. No button press is needed.

Questions

Which NUCLEO-F401RE pins do I use for the L298N?

ENA → D2 (PA10), IN1 → D4 (PB5), IN2 → PWM/D5 (PB4), IN3 → PWM/D6 (PB10), IN4 → D7 (PA8), ENB → D8 (PA9), GND → GND.

Does the L298N work with the NUCLEO-F401RE at 3.3 V?

Yes: the L298N runs at 5 V and the NUCLEO-F401RE uses 3.3 V signals, so no level shifting is needed.

BoardPilot checks this wiring in 3D as you build it, and finds crossed or missing wires on the real board.

Download BoardPilot

Full NUCLEO-F401RE pinout · L298N dual motor driver: all pins and data

The L298N on other boards

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