Application note

Introduction to FDCAN peripherals for STM32 MCUs

Rev 6 - January 2026

Introduction

The purpose of this document is detailed hereafter:
  • Give an overview of the controller area network (CAN) with flexible data-rate (CAN-FD) protocol.
  • Describe the improvements and benefits of CAN-FD over classical CAN (CAN2.0).
  • Present the CAN-FD implementation in the STM32 microcontrollers and microprocessors listed in the table below.
  • Describe the various modes and specific features of the FDCAN peripheral.

This application note applies to the products listed in the table below. This group of applicable products is referred to as STM32 devices in this document.

Table 1. Applicable products
Product classesProduct series
MicrocontrollersSTM32C0 series, STM32C5 series, STM32G0 series, STM32G4 series, STM32H5 series, STM32H7 series, STM32L5 series, STM32N6 series, STM32U5 series.
MicroprocessorsSTM32MP1 series.

General information

This application note gives an overview of the FDCAN peripheral embedded in the STM32 microcontrollers and microprocessors listed in Table 1, that are Arm® Cortex® core-based devices.

Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.