STMicroelectronics NUCLEO-L552ZE-Q

Overview

NUCLEO-L552ZE-Q from STMicroelectronics is an STM32 Nucleo-144 development board built around the STM32L552ZET6Q ultra-low-power Arm® Cortex®-M33 microcontroller in LQFP144 package, featuring 512 KB Flash, 256 KB SRAM, TrustZone® security, and integrated internal SMPS for efficient power management. It supports USB Type-C® full-speed device/host functionality and targets rapid prototyping of secure, battery-sensitive IoT edge nodes.

For engineers reviewing the NUCLEO-L552ZE-Q datasheet, NUCLEO-L552ZE-Q pinout, NUCLEO-L552ZE-Q application, or NUCLEO-L552ZE-Q equivalent, this board delivers verified ST-LINK/V2-1 debug/programming, ST Zio + Arduino® Uno V3 expansion compatibility, and out-of-box STM32Cube firmware examples for secure boot, AES-256, and low-power mode validation.

Technical Context

The board implements a complete evaluation platform for the STM32L552ZET6Q MCU, which integrates Arm TrustZone for system-level hardware isolation, a cryptographic accelerator (AES-256, PKA, RNG), and dual-bank secure flash with hardware write protection. Its internal SMPS replaces external DC-DC converters to reduce BOM count and improve efficiency in Run and Stop modes.

It features ST Zio expansion headers exposing all MCU I/Os-including flexible analog/digital peripherals-and a dedicated USB Type-C® connector configured for USB SNK/UFP (full-speed) operation, enabling direct connection to host PCs or peripheral devices without additional level-shifting circuitry.

Key Specifications

Availability

NUCLEO-L552ZE-Q is available at Aetrix Electronics and suitable for secure IoT sensor nodes, industrial wireless gateways, and battery-powered medical wearables requiring stable component supply, long-term lifecycle support, and certified cryptographic functionality.

Supply support for NUCLEO-L552ZE-Q 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, sensors, power ICs, and automotive-grade components with emphasis on energy efficiency, security, and industrial reliability.

This board belongs to the STM32 Nucleo-144 family-designed to accelerate development of secure, ultra-low-power embedded applications using Arm Cortex-M33 cores with hardware-enforced TrustZone isolation and integrated power management.

FAQ

Does NUCLEO-L552ZE-Q support external debug probes?

No-it integrates ST-LINK/V2-1 as a fixed on-board debugger/programmer with USB re-enumeration capability (mass storage, Virtual COM port, SWD/JTAG). External debuggers are unnecessary unless custom JTAG routing or advanced trace analysis is required beyond standard SWD capabilities.

What is the role of the internal SMPS on this board?

The internal SMPS replaces external DC-DC converters to generate the MCU's Vcore supply directly from the USB VBUS or external 5 V source. It reduces bill-of-materials cost, improves power conversion efficiency in Run/Stop modes, and enables sub-1.5 μA Stop2 current draw-critical for multi-year battery operation.

Can the USB Type-C® connector be used for both host and device roles?

No-the USB Type-C® interface on NUCLEO-L552ZE-Q is hardwired for USB SNK/UFP (full-speed) only, meaning it operates exclusively as a USB device or upstream-facing port (e.g., connecting to a PC host). Dual-role (DRD) operation requires external USB PD controller and firmware not supported by default.

Is TrustZone functionality enabled and testable out of the box?

Yes-STM32CubeMX v6.12+ and STM32CubeIDE v1.14+ include preconfigured TrustZone projects for NUCLEO-L552ZE-Q. Secure/non-secure image separation, secure boot validation, and AES-256 encryption demos run immediately after flashing, with no hardware modification required.