STMicroelectronics — STM32WL55 Wireless SoC

The STM32WL55 from STMicroelectronics is a system-on-chip (SoC) which combines a dual-core microcontroller with a sub-1 GHz radio to provide low-power wide-area networking (LPWAN) capability.

The STM32WL55 implements LoRa^® radio communications, as well as supporting the (G)FSK, (G)MSK and BPSK long-range radio modulation schemes. Featuring a similar hardware specification, the STM32WL54 SoC supports (G)FSK, (G)MSK and BPSK modulation but not the LoRa protocol.

By integrating a full-featured MCU based on dual Arm^® Cortex^®-M4 and Cortex-M0+ cores and a sub-1 GHz radio into a single chip, ST enables developers of connected industrial and IoT applications to simplify board design and assembly process, and to reduce bill-of-materials costs. The SoC’s Cortex-M0+ core performs various security services including secure firmware updating, secure firmware installation and management of secure keys. Application code runs on the Cortex-M4 core.

The SoC is backed by the comprehensive STM32WL software library and various packaged software examples available with the STM32CubeWL MCU package. It supports a wide choice of integrated development environments including IAR Embedded Workbench^®, MDK-ARM, and STM32CubeIDE.

ST also supplies the STM32WLE5 and STM32WLE4 wireless SoCs, which feature the same sub-1GHz radio alongside a single Cortex-M4 core. Both products support (G)FSK, (G)MSK and BPSK modulation, and the STM32WLE5 also implements LoRa networking. Unlike the STM32WL5x products, these single-core MCUs do not include advanced security features.