STMicroelectronics NUCLEO-F303RE

Overview

NUCLEO-F303RE from STMicroelectronics is a 64-pin STM32 Nucleo-64 development board built around the STM32F303RET6 microcontroller (Arm Cortex-M4F, 72 MHz, 512 KB Flash, 80 KB RAM), featuring integrated ST-LINK/V2-1 debugger/programmer via USB Mini-B, ARDUINO® Uno V3 and ST morpho expansion headers, and a 32.768 kHz crystal oscillator for real-time clock applications in motor control prototyping.

For engineers reviewing the NUCLEO-F303RE datasheet, NUCLEO-F303RE pinout, NUCLEO-F303RE application, or NUCLEO-F303RE equivalent, this board supports rapid evaluation of analog-comparator-based motor control loops, op-amp-based signal conditioning, and high-resolution PWM generation with hardware dead-time insertion - all critical for brushless DC and stepper motor drive validation.

Technical Context

The NUCLEO-F303RE implements the STM32F303RET6 MCU, which integrates dual 12-bit ADCs with hardware oversampling, four operational amplifiers, two fast comparators with programmable hysteresis, and advanced timers with complementary PWM outputs and configurable dead-time insertion - enabling closed-loop field-oriented control (FOC) without external analog components.

Its on-board ST-LINK/V2-1 provides full-speed USB debug interface supporting SWD, virtual COM port, and mass storage programming modes; power is flexibly sourced from USB VBUS or external 7–12 V supply, with onboard 3.3 V LDO regulation and dedicated test points for VDDA/VREF+ monitoring.

Key Specifications

Availability

NUCLEO-F303RE is available at Aetrix Electronics and suitable for industrial motor control prototyping, educational embedded systems labs, and medical device signal acquisition validation requiring stable component supply and long-term toolchain continuity.

Supply support for NUCLEO-F303RE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer applications with emphasis on energy efficiency and system integration.

The STM32 Nucleo series was developed to accelerate embedded software development by delivering standardized, open-hardware evaluation platforms with unified IDE support, pre-integrated debug probes, and direct access to full MCU peripheral sets.

FAQ

Does the NUCLEO-F303RE support external high-speed crystal oscillators?

No - the board ships without an external high-speed crystal (HSE). It defaults to the internal 8 MHz RC oscillator for system clock; users may solder a 24 MHz crystal between X1/X2 pads if required for precise timing, but no load capacitors are pre-mounted.

Can the on-board op-amps and comparators be used for sensor signal conditioning?

Yes - the STM32F303RET6 integrates four rail-to-rail op-amps and two fast comparators with programmable hysteresis and window mode, directly routable to ADC inputs or timer triggers, enabling analog front-end design for current sensing, overvoltage detection, and zero-crossing detection without external ICs.

Is the ST-LINK/V2-1 on NUCLEO-F303RE upgradeable to ST-LINK/V3 firmware?

No - the NUCLEO-F303RE uses a fixed-function ST-LINK/V2-1 chip with hardware-limited capabilities; it does not support ST-LINK/V3 firmware updates or features like SWV tracing, JTAG boundary scan, or higher-speed SWD clocks beyond 4 MHz.

What is the maximum current available on the 3.3 V rail for external shields?

The 3.3 V rail is supplied by an onboard LDO (LD3985) rated for 500 mA continuous output; sustained loads above 300 mA require thermal monitoring due to limited copper area and no heatsink, especially when powered solely from USB VBUS.