# Release Notes for

# STM32WL3xx CMSIS

Copyright © 2024-2025 STMicroelectronics

# Purpose

This driver provides the CMSIS device for the STM32WL3xx products. This covers

- STM32WL33x devices
- STM32WL3Rx devices

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

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

- Templates/system_stm32wl3x.c contains the initialization code referred as SystemInit.
- Startup files are provided as example for EWARM©.
- Linker files are provided as example for EWARM©.

# Update history

V1.3.1 / 20-November-2025

## Main Changes

- Added missing I2S support on WL3Rx devices (stm32wl3rx.h)

## Known Limitations

- None

## Development Toolchains and Compilers

- IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1

## Supported Devices and boards

- STM32WL3xx devices

V1.3.0 / 29-October-2025

## Main Changes

- Added support to STM32WL3Rx product line.
- [LCSC] LCSC_VER register removed from the accessible register list, as it is Non-User.
- [LCSC] Fixed a typo on an LCSC register name (COMP_CTN -> COMP_CNT)
- [MRSUBG] RSSI_FLT bit #3 renamed to `FREEZE_SYNC_ON_SYNC_OOK_PEAK_DECAY`

## Known Limitations

- None

## Development Toolchains and Compilers

- IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1

## Supported Devices and boards

- STM32WL3xx devices

V1.2.0 / 04-June-2025

## Main Changes

- Documentation based on jQuery 1.7.1 removed

## Contents

- Add PULSETRIM bits definition in CMSIS header files
- Renamed some interrupt to improve clarity and consistency
- Added FQCY_BAND_ID bits definition for RF_INFO_OUT register

## Known Limitations

- CMSIS devices files are delivered “as is” and have not been fully validated

## Development Toolchains and Compilers

- IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1

## Supported Devices and boards

- STM32WL3xx devices

V1.1.0 / 05-February-2025

## Main Changes

### Release

- Release of CMSIS for STM32WL3xx devices

## Contents

- CMSIS devices files for STM32WL3xx

## Known Limitations

- CMSIS devices files are delivered “as is” and have not been fully validated

## Development Toolchains and Compilers

- IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1

## Supported Devices and boards

- STM32WL3xx devices

V1.0.0 / 30-October-2024

## Main Changes

### First Release

- First Official Release of CMSIS for STM32WL33x devices

## Contents

- CMSIS devices files for STM32WL33x

## Known Limitations

- CMSIS devices files are delivered “as is” and have not been fully validated

## Development Toolchains and Compilers

- IAR Embedded Workbench for ARM (EWARM) toolchain V9.30.1

## Supported Devices and boards

- STM32WL33x devices