How to Use STM32 NUCLEO L552ZE-Q: Examples, Pinouts, and Specs

The STM32 NUCLEO L552ZE-Q is a development board manufactured by STMicroelectronics. It is based on the STM32L5 series microcontroller, which is designed for ultra-low-power applications with advanced security features. This board provides a flexible platform for prototyping and development, making it ideal for IoT, wearable devices, and other energy-efficient applications.

• IoT devices requiring low power consumption and secure communication
• Wearable technology
• Industrial automation and control systems
• Medical devices
• Prototyping for secure embedded systems

The STM32 NUCLEO L552ZE-Q is equipped with a range of features to support diverse applications. Below are the key technical details:

• Microcontroller: STM32L552ZET6Q (ARM Cortex-M33 core with TrustZone)
• Operating Voltage: 3.3V
• Power Supply Options: USB, external power supply, or ST-LINK/V2-1
• Clock Speed: Up to 110 MHz
• Flash Memory: 512 KB
• RAM: 256 KB
• GPIO Pins: 144 (accessible via headers)
• Connectivity:
  • USB Full-Speed
  • USART, SPI, I2C, CAN, and more
• Onboard Debugger: ST-LINK/V2-1
• Expansion Options: Arduino Uno V3 and ST morpho connectors
• Security Features: TrustZone, Secure Boot, and hardware cryptographic accelerators

The STM32 NUCLEO L552ZE-Q features multiple pin headers for GPIO and peripheral connections. Below is a summary of the pin configuration:

The STM32 NUCLEO L552ZE-Q is designed to be user-friendly and versatile. Follow the steps below to get started:

1. Power the Board: Connect the board to your computer using a USB cable or provide external power via the VIN pin.
2. Install Development Tools:
   • Download and install STM32CubeIDE or another compatible IDE.
   • Install the ST-LINK/V2-1 USB driver if required.
3. Connect to the IDE:
   • Open STM32CubeIDE and create a new project.
   • Select the STM32L552ZET6Q microcontroller or the NUCLEO-L552ZE-Q board.
4. Write and Upload Code:
   • Write your application code in the IDE.
   • Compile and upload the code to the board using the ST-LINK debugger.

The following example demonstrates how to blink an LED connected to pin D13:

#include "stm32l5xx_hal.h"

// Function prototypes
void SystemClock_Config(void);
void GPIO_Init(void);

int main(void) {
    HAL_Init(); // Initialize the HAL library
    SystemClock_Config(); // Configure the system clock
    GPIO_Init(); // Initialize GPIO pins

    while (1) {
        HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_13); // Toggle LED on pin D13
        HAL_Delay(500); // Delay for 500 ms
    }
}

void SystemClock_Config(void) {
    // Configure the system clock (default settings for simplicity)
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
    HAL_RCC_OscConfig(&RCC_OscInitStruct);

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                  | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
}

void GPIO_Init(void) {
    // Initialize GPIO pin D13 as output
    __HAL_RCC_GPIOB_CLK_ENABLE(); // Enable GPIOB clock
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_13;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}

• Ensure the board is powered correctly to avoid damage.
• Use the correct pin mappings for peripherals and GPIO.
• When using TrustZone or secure features, refer to the STM32L5 reference manual for configuration details.

1. Board Not Detected by IDE:

   • Ensure the ST-LINK driver is installed.
   • Check the USB connection and cable.
   • Verify that the board is powered on.

2. Code Upload Fails:

   • Confirm that the correct microcontroller or board is selected in the IDE.
   • Check for any errors in the code that may prevent compilation.

3. Peripherals Not Working:

   • Verify the pin configuration and connections.
   • Ensure the peripheral clock is enabled in the code.

• Use the onboard LEDs to debug basic functionality.
• Check the STM32CubeMX tool for generating initialization code.
• Refer to the STM32L5 datasheet and reference manual for detailed information.

By following this documentation, you can effectively use the STM32 NUCLEO L552ZE-Q for your development and prototyping needs.