How to Use STM32 NUCLEO-L432KC: Examples, Pinouts, and Specs

The STM32 NUCLEO-L432KC is a compact development board manufactured by STMicroelectronics. It features the STM32L432KC microcontroller, which is based on the ARM Cortex-M4 architecture. This board is designed for prototyping and developing low-power applications, offering a wide range of connectivity options and integrated peripherals. Its small form factor and compatibility with Arduino™ Uno V3 connectors make it a versatile choice for both beginners and experienced developers.

• IoT (Internet of Things) devices
• Low-power embedded systems
• Wearable technology
• Sensor interfacing and data acquisition
• Prototyping for industrial and consumer electronics

The STM32 NUCLEO-L432KC features a dual-row pin header layout. Below is a summary of the pin configuration:

1. Powering the Board:

   • Connect the board to a computer via the micro-USB port for power and programming.
   • Alternatively, supply power through the VIN pin (7V-12V) or the 3.3V pin (regulated).

2. Programming the Board:

   • Use the integrated ST-LINK/V2-1 debugger to program the microcontroller.
   • Compatible IDEs include STM32CubeIDE, Keil MDK, and IAR Embedded Workbench.

3. Connecting Peripherals:

   • Use the GPIO pins for digital input/output.
   • Connect sensors or other analog devices to the ADC pins.
   • Use the UART, I2C, or SPI interfaces for communication with external modules.

4. Arduino Compatibility:

   • The board supports Arduino™ Uno V3 connectors, allowing you to use Arduino shields.

• Ensure the input voltage does not exceed the specified range to avoid damaging the board.
• Use pull-up or pull-down resistors for GPIO pins when required.
• For low-power applications, utilize the STM32L432KC's power-saving modes (e.g., STOP or SLEEP).
• Always verify pin assignments and configurations in your code to avoid conflicts.

The STM32 NUCLEO-L432KC can be programmed using the Arduino IDE. Below is an example of blinking an LED connected to pin PA5:

// Define the LED pin
#define LED_PIN PA5

void setup() {
  // Initialize the LED pin as an output
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  // Turn the LED on
  digitalWrite(LED_PIN, HIGH);
  delay(1000); // Wait for 1 second

  // Turn the LED off
  digitalWrite(LED_PIN, LOW);
  delay(1000); // Wait for 1 second
}

1. The board is not detected by the computer:

   • Ensure the USB cable is functional and supports data transfer.
   • Verify that the ST-LINK drivers are installed on your computer.

2. Unable to upload code to the board:

   • Check the connection between the board and the computer.
   • Ensure the correct board and port are selected in the IDE.
   • Press the reset button on the board before uploading.

3. Peripherals are not working as expected:

   • Double-check the pin connections and configurations in your code.
   • Verify that the peripheral's power requirements are met.

4. The board overheats or does not power on:

   • Ensure the input voltage is within the specified range.
   • Check for short circuits or incorrect wiring.

Q: Can I use the STM32 NUCLEO-L432KC with Arduino libraries?
A: Yes, the board is compatible with the Arduino IDE and supports many Arduino libraries.

Q: How do I enable low-power modes?
A: Use the STM32 HAL or LL libraries to configure the microcontroller's power-saving features.

Q: Can I use the board for battery-powered applications?
A: Yes, the STM32L432KC microcontroller is optimized for low-power operation, making it suitable for battery-powered projects.

Q: Is the board compatible with all Arduino shields?
A: The board supports Arduino™ Uno V3 connectors, but some shields may require additional configuration or may not be fully compatible.

This concludes the documentation for the STM32 NUCLEO-L432KC. For further details, refer to the official datasheet and user manual provided by STMicroelectronics.