herunterladen
September 2017 DocID028890 Rev 3 1/74
1
AN4821
Application note
Migrating from STM32F405/415 line and STM32F407/417 line to
STM32L4 Series and STM32L4+ Series microcontrollers
Introduction
For designers of the STM32 microcontroller applications, being able to easily replace one
microcontroller type by another in the same product family is an important asset. Migrating
an application to a different microcontroller is often needed, when product requirements
grow putting extra demands on memory size or increasing the number of I/Os. The cost
reduction objectives may also be an argument to switch to smaller components and shrink
the PCB area.
This application note analyzes the steps required to migrate an existing design from
STM32F405/415 and STM32F407/417 lines to STM32L4 Series and STM32L4+ Series.
Three aspects must be considered for the migration: hardware, peripherals and firmware.
This document lists the full set of features available for STM32F405/415 and
STM32F407/417 lines and the equivalent features on STM32L4 Series and STM32L4+
Series (some products may have less features depending on their part number).
To fully benefit from this application note, the user should be familiar with the STM32
microcontrollers documentation available on www.st.com with a particular focus on:
STM32F405/415 and STM32F407/417 lines reference manual (RM0090)
STM32F405/415 and STM32F407/417 lines datasheets.
STM32L4 Series reference manuals:
– RM0351 (STM32L4x5xx, STM32L4x6xx)
– RM0394 (STM32L43xxx, STM32L44xxx, STM32L45xxx, STM32L46xxx)
– RM0392 (STM32L471xx)
STM32L4 Series datasheets
STM32L4+ Series reference manual
– RM0432 (STM32L4Rxxx, STM32L4Sxxx)
STM32L4+ Series datasheets.
www.st.com
