MCU Hardware

ST-LINK/V2-1

An on-board USB programmer/debugger used to program and debug the STM32 MCU via SWD without external hardware.

ST-LINK Section

The top portion of the Nucleo board that provides USB programming, debugging, power, and communication with the MCU.

MCU Section

The bottom portion of the Nucleo board containing the STM32 microcontroller, I/O pins, buttons, LEDs, and connectors.

SWD (Serial Wire Debug)

A two-wire ARM debugging interface used by ST-LINK to program and debug the STM32 microcontroller.

Arduino-Compatible Connectors

A set of single-row headers on the Nucleo board that follow the Arduino shield pin layout for hardware compatibility.

ST Morpho Connectors

Dual-row headers exposing nearly all STM32 MCU pins for advanced and flexible hardware access.

CN5 Connector

An Arduino digital connector providing GPIO, SPI, I2C, timer, and ground pins.

CN6 Connector

An Arduino power connector supplying RESET, 3.3 V, 5 V, GND, VIN, and IOREF signals.

CN8 Connector

An Arduino analog connector routing analog input pins to the STM32 ADC channels.

CN9 Connector

An Arduino digital connector supporting GPIO, USART, and timer functions.

CN7 Connector

An ST Morpho connector exposing MCU pins including power, control, and general I/O.

CN10 Connector

An ST Morpho connector providing extended access to STM32 GPIO, analog, and peripheral pins.

IOREF Pin

A reference voltage pin (3.3 V) allowing Arduino shields to match the MCU I/O voltage level.

VIN Pin

An external power input pin that accepts approximately 7–12 V to power the board through its voltage regulator.

NRST

A reset pin that forces the STM32 microcontroller into a reset state when driven low.

B1 USER Button

A multipurpose push button connected to a GPIO pin for user input in applications.

B2 RESET Button

A dedicated push button that resets the STM32 microcontroller.

LD2 (User LED)

A green LED connected to an MCU GPIO pin for visual output and debugging.

LD3 (Power LED)

A red LED indicating that power is supplied to the board

AREF

The voltage reference for the ADC; must not exceed 3.3 V and defines the ADC input range.

ADC

A peripheral that converts analog voltages (≤ 3.3 V) into digital values for processing.

USART (Universal Synchronous/Asynchronous Receiver-Transmitter)

A serial communication peripheral used for transmitting and receiving data.

SPI (Serial Peripheral Interface)

A high-speed synchronous serial communication protocol using MOSI, MISO, SCK, and CS lines.

Inter-Integrated Circuit

A two-wire serial communication protocol using SDA and SCL lines.

Timer Peripheral

A hardware unit used for timing, counting, PWM generation, and event measurement.

BOOT0 Pin

A configuration pin that selects the boot mode of the STM32 during power-up.

VBAT Pin

A backup power pin used to supply the real-time clock or retain data when main power is removed.

U5V

A 5-V supply provided from the USB ST-LINK interface.

0-Ohm Resistors

Configurable jumpers on the PCB used to enable, disable, or reroute hardware features.

STM32F302R8

The specific STM32 microcontroller used on the Nucleo-64 board, featuring ARM Cortex-M4 core, flash memory, SRAM, and peripherals.