🧩 NUCLEO-L432KC (STM32 Nucleo-32)

Product: NUCLEO-L432KC
Type: STM32 Nucleo-32 development / prototyping board with on-board debugger
Target MCU: STM32L432KCU6 (STM32L4 series, 32-pin package)

🌟 Overview

NUCLEO-L432KC is a compact STM32 Nucleo-32 board designed for quick evaluation and prototyping with an ultra-low-power STM32L4 microcontroller. It supports Arduino™ Nano V3 compatible expansion connectors, enabling easy feature extension using a wide range of shields. The board integrates ST-LINK/V2-1, so no external programmer/debugger is required.

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✅ Key board features

• 🧠 STM32 MCU in a 32-pin package (NUCLEO-L432KC ships with STM32L432KCU6)
• 🔌 Arduino™ Nano V3 expansion connectors
• 🛠️ On-board ST-LINK/V2-1 (SWD programming/debugging)
• 💾 USB re-enumeration interfaces via ST-LINK:
  • Mass storage (e.g., drag-and-drop style workflows)
  • Virtual COM port (VCP)
  • Debug port
• ⚡ Flexible power supply: ST-LINK USB VBUS or external sources
• 💡 User interface:
  • LD1 (USB COM), LD2 (PWR), LD3 (USER LED)
  • Reset push-button
• 🕒 24 MHz crystal oscillator (board-specific)
• 🧰 IDE support: STM32CubeIDE, plus IAR™, Keil® and GCC-based toolchains

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📌 Board technical specifications

Parameter	Value
Platform / form factor	STM32 Nucleo-32 (MB1180 reference platform)
Target microcontroller	STM32L432KCU6
Debug/programming	ST-LINK/V2-1, SWD
USB connector (ST-LINK)	USB Micro-AB
Expansion connectors	Arduino™ Nano V3 compatible
LEDs	LD1 (COM), LD2 (PWR), LD3 (USER)
Button	Reset
Power options	USB VBUS or external sources (3.3 V / 5 V / VIN 7–12 V)

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🧠 Target MCU (STM32L432KC family) — core technical parameters

CPU & memory

• 🧮 Arm® Cortex®-M4 (32-bit) with FPU
• ⏱️ Max CPU frequency: up to 80 MHz
• ⚙️ Performance: up to ~100 DMIPS (family characteristic)
• 💾 Flash: 256 KB
• 🧷 SRAM: 64 KB

Power

• 🔋 Operating voltage: 1.71 V to 3.6 V
• 🌙 Multiple low-power modes (ultra-low-power class)

Selected peripherals

• 🔌 USB Full-Speed device (crystal-less)
• 🚗 CAN (1)
• 🔊 SAI (1)
• 🧵 SWPMI
• 🧲 RNG and RTC
• 🎛️ 12-bit ADC: 1 unit, 10 channels
• 🎚️ 12-bit DAC: 2 channels
• 🧷 GPIO: up to 26 (MCU level); practical availability depends on board pinout

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🧰 Software & ecosystem

• ✅ STM32Cube MCU Package (STM32CubeL4): HAL/LL drivers, middleware, examples
• 🧩 STM32CubeMX for configuration and code generation
• 🧑‍💻 STM32CubeIDE for building and debugging
• 🌐 Broad IDE compatibility (IAR, Keil, GCC); Arm Mbed workflows may be used depending on your setup

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🎯 Typical applications

• Battery-powered and ultra-low-power prototypes
• Sensor acquisition (ADC), control (GPIO/PWM)
• USB device projects, serial communications, CAN networks
• Education and labs for STM32L4 series

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