ST STM32H725

Introduction
This application note is intended for system designers who develop applications based on STM32H723/33, STM32H725/35 and
STM32H730 microcontroller lines, and need an implementation overview of the following hardware features:
• Power supply
• Package selection
• Clock management
• Reset control
• Boot mode settings
• Debug management.
This document describes the minimum hardware resources required to develop an application based on STM32H723/33,
STM32H725/35 and STM32H730 microcontrollers.
Reference documents
• STM32H72x and STM32H73x datasheets
• STM32H723/733, STM32H725/735 and STM32H730 advanced Arm
®
-based 32-bit MCUs (RM0468)
• STM32H723/733, STM32H725/735 and STM32H730 errata sheet (ES0491)
The following documents are available on www.st.com website.
• Oscillator design guide for STM8S, STM8A and STM32 microcontrollers application note (AN2867)
• STM32 microcontroller system memory boot mode application note (AN2606).
Getting started with STM32H723/733, STM32H725/735 and STM32H730 Value
Line hardware development
AN5419
AN5419 - Rev 2 - May 2020
For further information contact your local STMicroelectronics sales office.
www.st.com

ST STM32H725 Specifications

General

Brand	ST
Model	STM32H725
Category	Microcontrollers
Language	English

Summary

Power Supplies

Introduction to Power Supplies

Explains the basic power requirements and general design guidelines for STM32H7 microcontrollers.

External Power Supplies and Components

Details external components and voltage ranges for various power supply pins, crucial for hardware design.

Digital Core Supply (Vcore)

Describes how the core voltage is supplied, including internal regulators and external sources.

Independent USB Transceiver Power Supply

Reset and Power Supply Supervisor

Power-On Reset (POR) Power-Down Reset (PDR)

Details the integrated reset circuitry for correct device start-up and operation.

Brownout Reset (BOR)

Programmable Voltage Detector (PVD)

Clocks

HSE and LSE Bypass (External User Clock)

External CrystalCeramic Resonator (HSE Crystal)

Alternate Function Mapping to Pins

Analog Inputs for ADC1, ADC2 and ADC3

Details on analog input pins for ADCs, including special pads for enhanced performance.

Boot Configuration

Boot Mode Selection

How to select boot modes using BOOT pin and option bytes for memory mapping.

Boot Pin Connection

System Bootloader Mode

Information on the embedded bootloader for Flash memory reprogramming via serial interfaces.

Debug Management

SWJ Debug Port (Serial Wire and JTAG)

Details on the integrated Serial Wire/JTAG debug port (SWJ-DP).

TPIU Trace Port

Pinout and Debug Port Pins

Pin assignments for debug ports and alternate general-purpose I/O functions.

Recommendations

Printed Circuit Board (PCB) Design

Ground and Power Supply (VSS, VDD)

Decoupling

How to properly connect power/ground pins and use decoupling capacitors for noise reduction.

Recommended PCB Routing Guidelines

PCB Stack-up

Guidelines for choosing PCB stack-ups to match impedance and reduce signal reflections.

Crystal Oscillator Layout

Power Supply Decoupling

Recommendations for adequate power decoupling to prevent noise and voltage drops.

High-Speed Signal Layout

Best practices for laying out high-speed signals like SDMMC, FMC, Octo-SPI, and ETM.

Use Case Examples