STMicroelectronics NUCLEO-L4P5ZG

Overview

NUCLEO-L4P5ZG from STMicroelectronics is a 144-pin STM32 Nucleo-144 development board built around the STM32L4P5ZGT6U Arm® Cortex®-M4 microcontroller (120 MHz, 1 MB Flash, 320 KB SRAM), featuring integrated ST-LINK/V2-1 debugger/programmer, USB OTG FS interface, and dual expansion headers (ST Zio + ST morpho) compatible with Arduino Uno V3. It supports low-power embedded prototyping in industrial sensing and IoT edge nodes.

For engineers reviewing the NUCLEO-L4P5ZG datasheet, NUCLEO-L4P5ZG pinout, NUCLEO-L4P5ZG application, or NUCLEO-L4P5ZG equivalent, key selection criteria include on-board debug capability, LQFP144 MCU package compatibility, SMPS absence (non-P variant), 32.768 kHz crystal support, and STM32Cube ecosystem integration for rapid firmware validation.

Technical Context

The board implements a split architecture: dedicated ST-LINK/V2-1 debug section (STM32F103CBT6) interfaces via SWD to the target STM32L4P5ZGT6U, enabling simultaneous programming, debugging, and virtual COM port communication over a single Micro-AB USB connection. Power routing supports three sources - ST-LINK USB VBUS, external VIN (7–12 V), or 5 V via ST morpho/CN11 - with automatic source selection controlled by JP6.

Hardware features include three user LEDs (LD1–LD3), two push-buttons (B1 user, B2 reset), a 32.768 kHz crystal for RTC operation, and configurable solder bridges (e.g., SB100–SB107) for analog/digital supply isolation and IDD current measurement via JP5. No external SMPS is present - distinguishing it from NUCLEO-L4P5ZG-P.

Key Specifications

Availability

NUCLEO-L4P5ZG is available at Aetrix Electronics and suitable for industrial sensor node development, IoT edge firmware validation, and educational embedded systems labs requiring stable component supply, consistent revision control, and long-term toolchain continuity.

Supply support for NUCLEO-L4P5ZG 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, power management ICs, sensors, and analog components for industrial, automotive, and consumer applications.

This board belongs to the STM32 Nucleo-144 family, engineered to accelerate evaluation and prototyping of high-pin-count STM32 MCUs - emphasizing out-of-box usability, IDE interoperability (IAR, Keil, STM32CubeIDE), and seamless integration with STM32Cube software ecosystem.

FAQ

Does NUCLEO-L4P5ZG support external SMPS for ultra-low-power operation?

No. The NUCLEO-L4P5ZG lacks the external SMPS circuitry found on the NUCLEO-L4P5ZG-P variant. It relies on an internal linear regulator for Vcore generation, resulting in higher active-mode current consumption compared to SMPS-equipped boards. For sub-100 µA Run mode operation, the '-P' version or discrete SMPS integration is required.

Can the ST-LINK/V2-1 on NUCLEO-L4P5ZG debug external STM32 targets?

Yes. The ST-LINK/V2-1 can debug external STM32 devices via SWD using the CN5 debug connector or routed signals (SWCLK, SWDIO, NRST) on the ST morpho header (CN11 pins 13, 14, 15). Voltage level matching (VDD_MCU) must be ensured, and the target's BOOT0 pin must be held low during programming.

What USB device classes does the integrated ST-LINK/V2-1 enumerate as?

The ST-LINK/V2-1 enumerates simultaneously as three USB composite devices: Mass Storage Class (for drag-and-drop firmware flashing), CDC ACM (Virtual COM Port for UART logging), and Debug Interface (for SWD/JTAG communication with IDEs). No driver installation is needed on Windows 10/11 or modern Linux/macOS systems.

Is the NUCLEO-L4P5ZG compatible with Arduino shields?

Yes - via the ST Zio connector, which mirrors the pin layout, voltage levels (3.3 V logic), and functionality of Arduino Uno R3. All digital I/O, analog inputs, PWM, I²C, SPI, and UART pins are electrically and mechanically aligned, enabling direct use of standard Arduino shields without level-shifting or adapter boards.