AP04 STM32 MCU 2Bus


A 32-bit MCU leaf with an ARM Cortex-M4 32-bit RISC core with STMicroelectronics FPU and two Leafony buses; connect a USB leaf for USB connection or a Shield leaf for SWD use Connect a USB leaf for USB connection or a Shield leaf for SWD use.


Item Description
Part number STM32L452REI6
Core ARM Cortex-M4
Operating voltage 3.3V
Input voltage 3.0-3.6V
Flash Memory 512 KB
Clock frequency 80MHz
Arduino IDE Board Settings Board: ”Nucleo-64”
Board Part number: “NUCLEO L452RE”
Upload method: ”STM32CubeProgrammer(Serial)
Dimension W23×D28×H4.7mm

Block diagram



About LEDs and switches

Item Description
LED Lights up when in write mode.
Reset switch Resets the STM32 and other devices.
Program switch Switch to change to Program mode.

Sample App

How to use it with Arduino

In order to use this leaf with Arduino, you need to configure the board on Arduino IDE.
Please refer to Environment for setting instructions.


Revision history

  • Rev A: First edition, December 2020

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Last modified 01.01.0001