STMicroelectronics NUCLEO-G031K8

Overview

NUCLEO-G031K8 from STMicroelectronics is an STM32 Nucleo-32 development board built around the STM32G031K8T6 32-bit Arm Cortex-M0+ microcontroller in a 32-pin TSSOP package, featuring on-board ST-LINK/V2-1 debugger/programmer, ARDUINO® Nano V3 expansion connector, and micro-AB USB interface for programming and virtual COM port. It supports rapid prototyping for low-power embedded control applications.

For engineers reviewing the NUCLEO-G031K8 datasheet, NUCLEO-G031K8 pinout, NUCLEO-G031K8 application, or NUCLEO-G031K8 equivalent, this board delivers integrated debug capability, STM32Cube software ecosystem compatibility, IDE support (STM32CubeIDE, IAR, Keil), and flexible power options - all critical for firmware validation, peripheral testing, and shield-based system expansion.

Technical Context

The NUCLEO-G031K8 implements a complete evaluation platform for the STM32G031K8T6 MCU, which integrates a 64 MHz Arm Cortex-M0+ core, 64 KB Flash, 8 KB SRAM, and peripherals including USART, I²C, SPI, timers, and ADC. The board routes all MCU GPIOs to the ARDUINO Nano V3 header and includes dedicated reset and user LED circuits.

ST-LINK/V2-1 is embedded as a separate subsystem with USB re-enumeration supporting mass storage (drag-and-drop programming), Virtual COM port (UART bridging), and SWD debug interface - eliminating need for external debug probes. Power can be sourced from USB VBUS or external 5–12 V via VIN pin.

Key Specifications

Availability

NUCLEO-G031K8 is available at Aetrix Electronics and suitable for industrial sensor node development, educational embedded labs, and IoT edge device prototyping requiring stable component supply, consistent firmware toolchain integration, and low-cost hardware validation.

Supply support for NUCLEO-G031K8 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 devices, and sensors for industrial, automotive, and consumer applications.

The STM32 Nucleo series targets rapid evaluation and prototyping of STM32 MCUs, emphasizing out-of-box usability, IDE interoperability, and shield-based scalability - enabling developers to validate firmware logic, peripheral drivers, and real-time behavior before custom PCB design.

FAQ

Does the NUCLEO-G031K8 include a crystal oscillator?

No. Unlike the NUCLEO-G431KB, the NUCLEO-G031K8 does not integrate a 24 MHz crystal oscillator. It relies on the STM32G031K8T6's internal RC oscillator (HSI) for system clock generation, with optional external clock input via the MCU's OSC_IN/OSC_OUT pins if added externally.

Can the NUCLEO-G031K8 program and debug other STM32 boards?

Yes. The on-board ST-LINK/V2-1 can be used as an external debugger by disconnecting the SB12 solder bridge and connecting SWDIO/SWCLK/GND lines to another STM32 target board. It supports standard SWD protocol and is recognized by STM32CubeIDE, IAR, and Keil without additional drivers.

What IDEs are officially supported for firmware development on this board?

STMicroelectronics officially supports STM32CubeIDE (cross-platform), IAR Embedded Workbench® for Arm (Windows only), and Keil MDK-ARM (Windows only, free version for Cortex-M0+). All provide full debugging, flash programming, and peripheral configuration via STM32CubeMX integration.

Is the ARDUINO Nano V3 header electrically compatible with commercial shields?

Yes. The 12-pin ARDUINO Nano V3 header provides 5 V-tolerant digital I/O (D0–D13), analog inputs (A0–A7), power (5 V, GND), and matches Nano pinout spacing and signal mapping - enabling direct use of off-the-shelf Nano shields for sensors, displays, or motor drivers without level-shifting.