STMicroelectronics NUCLEO-L433RC-P

Overview

NUCLEO-L433RC-P from STMicroelectronics is an STM32 Nucleo-64-P development board centered on the STM32L433RCT6P microcontroller (Arm Cortex-M4, 256 KB Flash, LQFP64), integrated with ST-LINK/V2-1 debugger/programmer, external SMPS support for ultra-low-power operation, and dual expansion interfaces (ARDUINO® Uno V3 and ST morpho). It enables rapid prototyping of battery-powered IoT sensors and portable medical devices.

For engineers reviewing the NUCLEO-L433RC-P datasheet, NUCLEO-L433RC-P pinout, NUCLEO-L433RC-P application, or NUCLEO-L433RC-P equivalent, key selection criteria include on-board SMPS compatibility, 32.768 kHz LSE crystal integration, USB composite device support (mass storage + VCP), and LQFP64 target MCU pin mapping to ARDUINO/morpho headers.

Technical Context

The board implements a dual-domain power architecture: ST-LINK/V2-1 operates at 3.3 V while the target STM32L433RC supports configurable VDD (1.8 V or 3.3 V) via solder bridge SB9 and jumper JP5, enabling precise low-power mode validation. The integrated SMPS reduces Run-mode current consumption by up to 40% versus linear regulators.

Hardware-level debugging is enabled through SWD interface (SWCLK/SWDIO/NRST routed to CN5 morpho pins 17/15/14), while USB Micro-B (CN1) provides simultaneous programming, virtual COM port (LPUART1/USART1), and mass storage access without external tools - all managed by ST-LINK/V2-1 firmware with USB reenumeration capability.

Key Specifications

Availability

NUCLEO-L433RC-P is available at Aetrix Electronics and suitable for low-power sensor node development, portable diagnostic equipment, and educational embedded systems requiring stable component supply and long-term toolchain continuity.

Supply support for NUCLEO-L433RC-P 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 microcontrollers, analog ICs, power management, and MEMS sensors for industrial, automotive, and consumer applications.

The STM32 Nucleo series targets rapid prototyping and education, delivering standardized, open-hardware development platforms with full STM32Cube software ecosystem integration and seamless IDE support (IAR, Keil, STM32CubeIDE).

FAQ

Does NUCLEO-L433RC-P support external SMPS configuration?

Yes - the board includes dedicated SMPS experimentation circuitry and solder bridge SB9 to enable or disable the external SMPS. When enabled, it supplies 1.1 V to the MCU core, reducing Run-mode current by ~40% versus LDO operation. Configuration requires JP5 jumper setting and matching VDD selection (1.8 V or 3.3 V) per UM2206 Section 6.5.3.

Can the ST-LINK/V2-1 debug an external STM32 target?

Yes - the ST-LINK/V2-1 can program and debug external STM32 MCUs via SWD interface. Pins SWCLK (CN5 pin 17), SWDIO (CN5 pin 15), and NRST (CN5 pin 14) are exposed on the ST morpho connector. Proper voltage level matching between ST-LINK and target VDD_MCU is required, as ST-LINK/V2-1 does not support voltages below 3 V without external level shifting.

What USB device classes does the on-board ST-LINK/V2-1 implement?

The ST-LINK/V2-1 implements three USB device classes simultaneously: Mass Storage Class (for drag-and-drop firmware flashing), CDC ACM (Virtual COM Port for LPUART1/USART1 serial communication), and Debug Interface (SWD over USB). All are enumerated automatically on host connection without driver installation on Windows 10+, macOS, or Linux.

Is the NUCLEO-L433RC-P compatible with Arduino shields?

Yes - the board features a fully compliant ARDUINO® Uno V3 mechanical and electrical interface (14 digital I/O, 6 analog inputs, 6 PWM, I²C, SPI, reset line), enabling direct use of standard Arduino shields. Pin mappings match the Uno V3 specification, and power rails (5 V, 3.3 V, GND) are provided per UM2206 Table 14.