STMicroelectronics NUCLEO-F042K6

Overview

NUCLEO-F042K6 from STMicroelectronics is an STM32 Nucleo-32 development board built around the STM32F042K6T6 32-bit Arm® Cortex®-M0 microcontroller in a 32-pin TSSOP package, featuring 32 KB Flash, 6 KB RAM, and integrated ST-LINK/V2-1 debugger/programmer. It supports Arduino Nano V3 expansion, USB-based programming and virtual COM port, and includes one user LED and one reset button for rapid prototyping of low-power industrial control and sensor interface applications.

For engineers reviewing the NUCLEO-F042K6 datasheet, NUCLEO-F042K6 pinout, NUCLEO-F042K6 application, or NUCLEO-F042K6 equivalent, this board delivers verified out-of-box debug capability, STM32Cube firmware support, and direct compatibility with IAR Embedded Workbench®, Keil MDK-ARM, and STM32CubeIDE - eliminating need for external probes in early-stage firmware validation.

Technical Context

The NUCLEO-F042K6 implements a complete embedded development environment on a single PCB: the onboard ST-LINK/V2-1 provides JTAG/SWD debugging, mass storage programming, and Virtual COM port over Micro-AB USB without requiring host drivers on Windows 10/11, Linux 64-bit, or macOS. Power can be sourced either from USB VBUS or external 5 V/3.3 V inputs, enabling standalone operation during peripheral bring-up.

It targets the STM32F042K6T6 MCU - a Cortex-M0 device with USB 2.0 FS interface, 12-bit ADC (1.0 μs conversion), up to 16 timers including advanced-control PWM, and multiple serial interfaces (I²C, SPI, USART). The board includes a 24 MHz crystal oscillator for precise clocking of USB and real-time peripherals.

Key Specifications

Availability

NUCLEO-F042K6 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB-connected edge controllers, and educational embedded systems requiring stable component supply, consistent firmware toolchain integration, and long-term IDE compatibility.

Supply support for NUCLEO-F042K6 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 was developed to lower entry barriers for Arm-based embedded development, delivering standardized, open-hardware evaluation platforms with unified software ecosystems across STM32 product lines.

FAQ

Does NUCLEO-F042K6 support USB device enumeration without additional drivers?

Yes. The onboard ST-LINK/V2-1 implements USB CDC ACM class, enabling automatic Virtual COM port recognition on Windows 10/11, Linux 64-bit, and macOS without custom driver installation. Mass storage programming mode also appears as removable drive for drag-and-drop firmware updates.

What is the maximum operating frequency of the target MCU on this board?

The STM32F042K6T6 operates at up to 48 MHz using its internal PLL, driven by the 24 MHz external crystal oscillator. This frequency is fully supported for all peripherals including USB 2.0 Full-Speed, 12-bit ADC, and advanced timers with complementary outputs.

Can the Arduino Nano V3 header be used for both digital and analog functions?

Yes. The ARDUINO Nano V3 connector exposes 14 digital I/O pins (including 6 PWM-capable), 8 analog input channels (ADC_IN0–ADC_IN7), and dedicated I²C, SPI, and USART signals - all mapped directly to STM32F042K6T6 GPIOs and peripherals per UM1956 schematic and pin definition table.

Is STM32CubeMX configuration supported for this board?

Yes. STM32CubeMX fully supports the STM32F042K6T6 device and generates initialization code compatible with the NUCLEO-F042K6 hardware layout, including correct clock tree setup for the 24 MHz crystal, USB clock routing, and pin assignments matching the Arduino Nano V3 header and on-board peripherals.