June 2014

DocID026596 Rev 1

1/6

AN4547

Application note

Migrating from STM32F407xx/417xx to

STM32F427xx/429xx/437xx/439xx

Introduction

Designers of STM32 microcontroller applications must have the possibility to easily replace

one microcontroller with another from the same product series. Reasons for migrating an

application to a different microcontroller can be for example;

 to fulfill higher product requirements, extra demands on memory size, or an increased

number of I/Os.

 to meet cost reduction constraints that require to switch to smaller components and shrink

the PCB area.

This application note is written as a help with the analysis of the steps involved when

migrating from an existing STM32F407xx/417xx-based design to the

STM32F427xx/429xx/437xx/439xx one withing the high performance STM32F4 series.

This application note gathers the most important information and presents the main

considerations to address.

Table 1 provides the list of products to which this document applies.

This application note is not exhaustive and comes as a complement of other product

specifications available on www.st.com/stm32:

 Datasheets

– DS8597 and DS8626 for STM32F407xx/417xx microcontrollers respectively,

– DS9405 and DS9484 for STM32F427xx/429xx/437xx/439xx microcontrollers

respectively.

 Errata sheets

– STM32F405xx/407xx and STM32F415xx/417xx device limitations,

– STM32F427xx/437xx and STM32F429xx/439xx line limitations.

 Reference manual

– RM0090 - STM32F405xx/07xx, STM32F415xx/17xx, STM32F42xxx and

STM32F43xxx advanced ARM®-based 32-bit MCUs

 Programming manual

 Application note

– AN4488 - Getting started with STM32F4xxxx MCU hardware development,

– AN2606 - STM32 microcontroller system memory boot mode.

www.st.com