# Release Notes for

# STM32WLxx CMSIS

Copyright © 2020 STMicroelectronics

# Purpose

This driver provides the CMSIS device for the stm32WLxx products. This covers

- STM32WL55xx devices
- STM32WL54xx devices
- STM32WLE5xx devices
- STM32WLE4xx devices
- STM32WL5Mxx devices

This driver is composed of the descriptions of the registers under “Include” directory.

Various template file are provided to easily build an application. They can be adapted to fit applications requirements.

- Templates/system_stm32WLxx.c contains the initialization code referred as SystemInit.
- Startup files are provided as example for IAR©, KEIL© and STM32CubeIDE©.
- Linker files are provided as example for IAR©, KEIL© and STM32CubeIDE©.

# Update History

V1.3.0 / 29-October-2025

## Main Changes

- Update STM32CubeIDE projects to fix the location of .size directive in startup code to allow proper size information of vector table
- Change addresses of ROM symbols in sram.icf template files to code region alias in order to increase performance while running code from SRAM
- Allow redefinition of the macro ‘VECT_TAB_OFFSET’ externally from the IDE, makefile, or command line.

## Known Limitations

None

## Dependencies

None

## Notes

None

V1.2.0 / 09-November-2022

## Main Changes

- Add new device STM32WL5Mxx
- Rename ADC_TRx to ADC_AWDxTR to match with Reference Manual
- Fix inconsistent IRQn_Type enumeration for supervisor call exception with alias for compatibility

## Known Limitations

None

## Dependencies

None

## Notes

None

V1.1.1 / 4-February-2022

## Main Changes

- All source files and templates: update disclaimer to add reference to the new license agreement

## Known Limitations

None

## Dependencies

None

## Notes

None

V1.1.0 / 16-June-2021

## Main Changes

- Add atomic register access services:
  - 32-bit register access: ATOMIC_SET_BIT(), ATOMIC_CLEAR_BIT(), ATOMIC_MODIFY_REG()
  - 16-bit register access: ATOMIC_SETH_BIT(), ATOMIC_CLEARH_BIT(), ATOMIC_MODIFYH_BIT()
- Add define LSI_STARTUP_TIME used in default IWDG timeout calculation (HAL_IWDG_DEFAULT_TIMEOUT)
- Add reference to user manual for customization of CubeIDE linker files

## Known Limitations

None

## Dependencies

None

## Notes

None

V1.0.0 / 28-October-2020

## Main Changes

First Official Release

## Contents

First official release of CMSIS drivers for STM32WLxx lines

## Known Limitations

None

## Dependencies

None

## Notes

None