STM32WL55JC datasheet(11/145 Pages) STMICROELECTRONICS

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DS13293 Rev 1

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STM32WL55/54xx

Introduction

This document provides information on the STM32WL55/54xx microcontrollers.

For information on the Arm®(a) Cortex®-M4 and Cortex®-M0+ cores, refer respectively to the

Cortex®-M4 Technical Reference Manual and to the Cortex®-M0+ Technical Reference

Manual available from the www.arm.com website.

For information on LoRa® modulation, refer to the Semtech website

(https://www.semtech.com/technology/lora).

Description

The STM32WL55/54xx long-range wireless and ultra-low-power devices embed a powerful

and ultra-low-power LPWAN-compliant radio solution, enabling the following modulations:

LoRa®, (G)FSK, (G)MSK, and BPSK.

The LoRa® modulation is available in STM32WLx5xx only.

These devices are designed to be extremely low-power and are based on the

high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to

48 MHz. This core implements a full set of DSP instructions. It is complemented by an Arm®

Cortex®-M0+ microcontroller. Both cores implement an independent memory protection unit

(MPU) that enhances the application security.

The devices embed high-speed memories (256-Kbyte Flash memory, 64-Kbyte SRAM), and

an extensive range of enhanced I/Os and peripherals.

The devices also embed several protection mechanisms for embedded Flash memory and

SRAM: readout protection, write protection and proprietary code readout protection.

In addition, the STM32WL55/54xx devices support the following secure services running on

Arm® Cortex-M0+: unique boot entry capable, secure sub-GHz MAC layer, secure firmware

update, secure firmware install and storage and management of secure keys.

These devices offer a 12-bit ADC, a 12-bit DAC low-power sample-and-hold, two

ultra-low-power comparators associated with a high-accuracy reference voltage generator.

The devices embed a low-power RTC with a 32-bit sub-second wakeup counter, one 16-bit

single-channel timer, two 16-bit four-channel timers (supporting motor control), one 32-bit

four-channel timer and three 16-bit ultra-low-power timers.

a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

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