STM32 USB Hardware and PCB Guidelines AN4879

About this manual

This document provides an overview of the USB peripherals implemented on STM32 microcontrollers, covering full-speed and high-speed operations through embedded and/or external PHYs. It serves as a guide for developers to understand the specific USB interfaces available across different STM32 product series.

The document also provides essential hardware guidelines for Printed Circuit Board (PCB) design. These guidelines ensure electrical compliance with USB standards, including protection against Electrostatic Discharge (ESD) and Electromagnetic Interference (EMI), and detail requirements for pull-up resistors and voltage levels.

What's inside

• Introduction
• USB on STM32 products
• Supported USB speeds
• Protection against ESD and EMI
• Applicable products
• USB implementation tables
• Abbreviations and acronyms

Specifications

Frequently asked questions

What ESD standard must STM32 USB designs comply with?

The system must comply with both the JESD22-A114D (HBM) and the IEC 61000-4-2 standards.

What is the required pull-up resistor value for USB compliance?

The USB_DP pin must be pulled up with a 1.5 kΩ resistor.

Which STM32 series are covered in this application note?

The note covers the STM32F0, F1, F2, F3, F4, F7, L0, L1, L4, H5, H7, and U5 series.