AN3422 Datasheet, PDF (1/52 Pages) STMicroelectronics – Migration of microcontroller applications from STM32F1 to STM32L1 series

AN3422
Application note
Migration of microcontroller applications
from STM32F1 to STM32L1 series
1
Introduction
For designers of STM32 microcontroller applications, it is important to be able to easily
replace one microcontroller type by another one in the same product family. 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. On the other
hand, cost reduction objectives may force you to switch to smaller components and shrink
the PCB area.
This application note is written to help you and analyze the steps you need to migrate from
an existing STM32F1 devices based design to STM32L1 devices. It groups together all the
most important information and lists the vital aspects that you need to address.
To migrate your application from STM32F1 series to STM32L1 series, you have to analyze
the hardware migration, the peripheral migration and the firmware migration.
To benefit fully from the information in this application note, the user should be familiar with
the STM32 microcontroller family. You can refer to the following documents that are available
from www.st.com.
● The STM32F1 family reference manuals (RM0008 and RM0041), the STM32F1
datasheets, and the STM32F1 Flash programming manuals (PM0075, PM0063 and
PM0068).
● The STM32L1 family reference manual (RM0038), the STM32L1 datasheets, and the
STM32F1 Flash and EEPROM programming manual (PM0062).
For an overview of the whole STM32 series and a comparison of the different features of
each STM32 product series, please refer to AN3364 Migration and compatibility guidelines
for STM32 microcontroller applications.
March 2012
Doc ID 018976 Rev 2
1/52
www.st.com