ST NUCLEO-WL55JC STM32WL User Manual

6.6.2 Push-buttons
B1 (USER)
The user button is connected to the STM32WL I/O PA0 by default (WKUP1, SB16 ON, and SB15 OFF) or PC13
(WKUP2, SB15 ON, and SB16 OFF) of the STM32WL microcontroller.
B2 (USER)
The user button is connected to the STM32WL I/O PA1 of the STM32WL microcontroller.
B3 (USER)
The user button is connected to the STM32WL I/O PC6 of the STM32WL microcontroller.
B4 (RESET)
This push-button is connected to NRST and is used to RESET the STM32WL microcontroller.
6.6.3 RF overview
The STM32WL Nucleo-64 board embeds an RF 3-port switch (SP3T) to address, with the same board the
three modes: reception, high-power transmission, and low-power transmission. The choice between the two
transmission modes can be done dynamically, thanks to two DC switches controlled by FE_CTRL1 (GPIO from
STM32WL MCU):
• The transmission high-output power amplifier (PA HP) is supplied from the PA regulator (REG PA) up to
3.1 V. For this, the REG PA must be supplied directly from VDDSMPS.
• The transmission default low-output power amplifier (PA LP) can be supplied from the PA regulator (REG
PA) up to 1.35 V. For this, the REG PA must be supplied from the regulated VFBSMPS supply at 1.55 V.
The RF block diagram is displayed in Figure 18.
UM2592
Board functions
UM2592 - Rev 1
page 26/49

ST NUCLEO-WL55JC STM32WL Specifications

General

Microcontroller	STM32WL55JC
Flash Memory	256 KB
RAM/SRAM	64 KB
Operating Frequency	Up to 48 MHz
On-board debugger	ST-LINK/V2-1
ADC	12-bit, up to 16 channels
Wireless Technology/Radio	LoRa, (G)FSK, (G)MSK, BPSK
Operating Voltage	1.7 V to 3.6 V
DAC	12-bit
Communication Interfaces	SPI, I2C, USART
Operating Temperature	-40 °C to +85 °C

Summary

Introduction

Features

Ordering information

Codification

Explanation of product order code structure.

Development environment

System requirements

Specifies operating systems and hardware for development.

Development toolchains

Lists supported software development tools.

Demonstration software

Information about preloaded demo software and its source.

Conventions

Quick start

Getting started

Step-by-step guide to configure and launch the demo application.

Hardware layout and configuration

PCB layout

Diagram showing component placement on the top layer of the PCB.

Mechanical drawing

Drawing showing physical dimensions and layout of the board.

Embedded STLINK-V3E

Details on the integrated STLINK-V3E debugger/programmer, drivers, firmware, and external tools.

Power supply

Explains various power supply options and their configurations for the board.

Clock sources

Details on configuring high-speed (HSE) and low-speed (LSE) external clocks.

Board functions

Covers LEDs, push-buttons, RF overview, current measurement, and solder bridges.

Board connectors

CN1 STLINK-V3E USB Micro-B connector

Connects the embedded STLINK-V3E to a PC for programming and debugging.

CN16 MIPI10 connector

Debugging connector with STDC14 pinout compatibility.

CN12 SMA connector

50 Ohm SMA connector for RF output.

CN5, CN6, CN8, and CN9 ARDUINO® Uno V3 connectors

Female connectors compatible with ARDUINO Uno V3 standard shields.

CN7 and CN10 ST morpho connectors

Male pin headers providing access to all STM32WL MCU signals.

STM32WL Nucleo-64 board information

Product marking

Information on product identification stickers on the PCB.

Board revision history

Details the revision history of the MB1389 board.

Known limitations

Lists any limitations, such as output power restrictions.

STM32WL Nucleo-64 I/O assignment

Federal Communications Commission (FCC) and Innovation, Science and Economic Development Canada (ISED) Compliance Statements

FCC Compliance Statement

FCC rules and compliance information for the device.

Additional FCC and ISED Compliance Statements

Further compliance statements for FCC and ISED regulations.

Déclaration de conformité CE simplifiée

Revision history