May 2015

DocID027558 Rev 2

1/27

1

AN4660

Application note

Migration of microcontroller applications from

STM32F42xxx/STM32F43xxx to STM32F74xxx/STM32F75xxx

Introduction

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

one microcontroller type with another one 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 an help with the analysis of the steps involved when

migrating from an existing STM32F42xxx/STM32F43xxx device to

STM32F74xxx/STM32F75xxx device based design.

This application note provides a guideline on hardware migration and peripheral migration.

To better understand the information inside this application note, the user should be familiar

with the STM32 microcontroller family.

For additional information, please refer to STM32F42xxx/STM32F43xxx and

STM32F74xxx/STM32F75xxx reference manuals (RM0090 and RM0385) and datasheets.

Table 1. Applicable products

Type

Part number

Microcontrollers

STM32F427AG, STM32F427AI, STM32F427IG, STM32F427II, STM32F427VG,

STM32F427VI, STM32F427ZG, STM32F427ZI

STM32F437AI, STM32F437IG, STM32F437II, STM32F437VG, STM32F437VI,

STM32F437ZG, STM32F437ZI

STM32F429AG, STM32F429AI, STM32F429BE, STM32F429BI, STM32F429IE,

STM32F429IG, STM32F429II, STM32F429NE, STM32F429NI, STM32F429VE,

STM32F429VG, STM32F429VI, STM32F429ZE, STM32F429ZG, STM32F429ZI

STM32F439AI, STM32F439BG, STM32F439BI, STM32F439IG, STM32F439II,

STM32F439JG, STM32F439NG, STM32F439NI, STM32F439VG, STM32F439VI,

STM32F439ZG, STM32F439ZI

STM32F745ZG, STM32F745VG, STM32F745ZE, STM32F745IE, STM32F745VE

STM32F746VG, STM32F746ZG, STM32F746IG, STM32F746BG, STM32F746NG,

STM32F746IE, STM32F746VE, STM32F746ZE, STM32F746BE, STM32F746NE

STM32F756VG, STM32F756ZG, STM32F756IG, STM32F756BG, STM32F756NG

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