ST NUCLEO-WB55RG STM32WB User manual

UM2819
User manual
STM32WB Nucleo-64 board (MB1355)
Introduction
The NUCLEO-WB55RG STM32WB Nucleo-64 board based on the MB1355 board is a Bluetooth® Low Energy wireless
and ultra-low-power device embedding a powerful and ultra-low-power radio compliant with the Bluetooth® Low Energy SIG
specification v5.2 and IEEE802.15.4-2011 PHY and MAC is supported.
The ARDUINO® Uno V3 connectivity support and the ST morpho headers provide an easy means of expanding the functionality
of the STM32WB Nucleo open development platform with a wide choice of specialized shields.
Figure 1. NUCLEO-WB55RG top view
Picture is not contractual.
UM2819 - Rev 1 –March 2022
For further information contact your local STMicroelectronics sales office.
www.st.com

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Features
1 Features
•STM32WB55RG (1-Mbytes Flash memory, 256-Kbyte SRAM, in VFQFPN68 package) ultra‑low‑power
wireless microcontroller featuring:
–Dual-core 32‑bit (Arm® Cortex®-M4 and dedicated M0+ CPU for real-time radio layer)
–2.4 GHz RF transceiver supporting Bluetooth® specification v5.2
•Three user LEDs
•One reset and three user push-buttons
•Board connectors:
–ARDUINO® Uno V3 expansion connector
–ST morpho extension pin headers for full access to all STM32WB I/Os
•Integrated PCB antenna and SMA connector footprint
•Flexible power-supply options: ST-LINK, USB VBUS, or external sources
•On-board footprint to mount a CR2032 battery socket
•On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage, Virtual
COM port, and debug port
•Comprehensive free software libraries and examples available with the STM32CubeWB MCU Package
•Support of a wide choice of Integrated Development Environments (IDEs) including IAR Embedded
Workbench®, MDK-ARM, STM32CubeIDE
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
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Ordering information
2 Ordering information
To order the NUCLEO-WB55RG Nucleo-64 board, refer to Table 1. Additional information is available from the
datasheet and reference manual of the target STM32.
Table 1. Ordering information
Order code
Board reference
Target STM32
NUCLEO-WB55RG
MB1355
STM32WB55RG
2.1 Codification
The meaning of the codification is explained in Table 2.
Table 2. Codification explanation
NUCLEO-XXRYTZ
Description
Example: NUCLEO-WB55RG
XX
MCU series in STM32 32-bit Arm Cortex MCUs
Wireless Bluetooth® STM32WB Series
Y
Product line in the Series
STM32WBx5 product line
R
Product‑specific in the product line:
•1: Die 1, full set of features
STM32WB55 MCU family
T
STM32 package pin count:
•R for 68 pins
68‑pin package
Z
STM32 Flash memory size:
•G for 1 Mbytes
1‑Mbyte Flash memory

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Development environment
3
Development environment
3.1
System requirements
•Multi‑OS support: Windows® 10, Linux® 64-bit, or macOS®
•USB Type-A or USB Type-C® to Micro-B cable
Note:
macOS® is a trademark of Apple Inc. registered in the U.S. and other countries.
Linux® is a registered trademark of Linus Torvalds.
All other trademarks are the property of their respective owners.
3.2
Development toolchains
•IAR Systems® - IAR Embedded Workbench®(1)
•Keil® - MDK-ARM(1)
•STMicroelectronics - STM32CubeIDE
1. On Windows® only.
3.3 Demonstration software
The demonstration software, included in the STM32Cube MCU Package corresponding to the on-board
microcontroller, is preloaded in the STM32 Flash memory for easy demonstration of the device peripherals in
standalone mode. The latest versions of the demonstration source code and associated documentation can be
downloaded from www.st.com.

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Conventions
4 Conventions
Table 3 provides the conventions used for the ON and OFF settings in the present document.
Table 3. ON/OFF convention
Convention
Definition
Jumper JPx ON
Jumper fitted
Jumper JPx OFF
Jumper not fitted
Jumper JPx [1-2]
Jumper fitted between Pin 1 and Pin 2
Solder bridge SBx ON
SBx connections closed by 0 Ω resistor
Solder bridge SBx OFF
SBx connections left open
Resistor Rx ON
Resistor soldered
Resistor Rx OFF
Resistor not soldered

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Safety recommendations
5 Safety recommendations
5.1 Targeted audience
This product targets users with at least basic electronics or embedded software development knowledge such as
engineers, technicians, or students. This board is not a toy and is not suited for use by children.
5.2 Handling the board
This product contains a bare printed circuit board and like all products of this type, the user must be careful about
the following points:
•The connection pins on the board may be sharp, be careful when handling the board to avoid hurting
yourself
•This board contains static sensitive devices. To avoid damaging it, handle the board in an ESD‑proof
environment.
•While powered, do not touch the electric connections on the board with your fingers or anything conductive.
The board operates at a voltage level that is not dangerous, but components may be damaged when
shorted.
•Do not put any liquid on the board and avoid operating the board close to water or at a high humidity level.
•Do not operate the board if dirty or dusty.

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Quick start
6 Quick start
This section describes how to quickly start development using NUCLEO-WB55RG.
To use the product, the user must accept the Evaluation Product License Agreement from the www.st.com/
epla webpage. For more information on the STM32WB Nucleo-64 board and demonstration software, visit the
www.st.com/stm32nucleo webpage.
Before the first use, make sure that no damage has occurred to the board during shipment:
•All socketed components must be firmly secured in their sockets.
•Nothing must be loose in the board blister.
The Nucleo board is an easy-to-use development kit to quickly evaluate and start development with an STM32
microcontroller in a QFN48 package.
6.1 Getting started
Follow the sequence below to configure the STM32WB Nucleo-64 board and launch the demonstration
application (Refer to Figure 3 for component location):
1. Check jumper positions on board: JP2, JP3, JP4, and JP6 ON, JP1 (Power source) on USB_STL, all JP5
jumpers ON except for GND.
2. Install the STMicroelectronics Bluetooth® Low Energy sensor mobile application on a Bluetooth® Low
Energy compatible mobile device from App Store® or Google Play™.
3. Connect the Nucleo board to a PC with a USB Type-A or USB Type-C® to Micro-B cable through CN15 USB
ST-LINK connector. Once powered on, the LD2 green LED blinks for each advertising interval –timeout after
one minute.
4. Use the STMicroelectronics Bluetooth® Low Energy sensor mobile application to detect the STM32WB P2P
server (P2PSRV1) and connect it. Once connected, the LD2 green LED blinks for each connection interval.
The smartphone application displays the device's service and characteristics.
5. Pushing the B1 button on the board toggles the alarm on the smartphone display. Pushing the B2 button
changes the connection interval (50 ms, 1 s). The effect is visible directly on the LD2 green LED of the
Nucleo board. On the smartphone, push the lamp to switch ON or OFF the Nucleo board LD1 blue LED. For
more details, refer to the user manual STM32CubeWB Nucleo demonstration firmware (UM2551).
6. The demonstration software and several software examples showing how to use the STM32 Nucleo features
are available from the NUCLEO-WB55RG product location.

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Hardware layout and configuration
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7 Hardware layout and configuration
The NUCLEO-WB55RG Nucleo-64 board is designed around the STM32WB55RG microcontroller. The hardware
block diagram in Figure 2 illustrates the connection between NUCLEO-WB55RG and its peripherals (ARDUINO®
Uno V3 connector, ST morpho connector, and embedded ST-LINK).
Figure 3 to Figure 5 help the user to locate these features on the NUCLEO-WB55RG board. The mechanical
dimensions of the NUCLEO-WB55RG product are shown in Figure 6.
Figure 2. Hardware block diagram
PCB
Antenna
STLink V2.1
USB
STLink
LDO
5V to 3V
Level Shifter
ESD
Protection
USB
User
ESD
protection
3x LEDs
3x Push Button
Arduino Extension
Connectors
32MHz
Crystal
Morphos Extension Connectors
LDO
5V to 3V
CR2032 Li
Battery
Power Selector
STM32WB55 Filter
Matching
32kHz768
Crystal
LDO
12V to 5V
Board Power
External
Power
Supply
(Optional)
Reset
Push
Button
External
Power
Supply
(Optional)
STM32WB55
Debug
RF Path
GPIOs
Power Managment
MB1355

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Hardware layout and configuration
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Figure 3. NUCLEO-WB55RG PCB top side
Figure 4. NUCLEO-WB55RG PCB with details of the main part (SoC and RF)
ST Restricted
View of STM32WB55RG
after removing the shield,
HSE Crystal (32MHz)
LSE Crystal (32.768KHz)
External Components of SMPS
MLPF-WB55-01E3
(Matching Network & Filter)
U1 STM32WB55RG
ST Restricted
Footprint for
SMA connector
(optional)
PCB Antenna
L1/C37 Matching network
CN5 digital 8-15 ARDUINO®
CN9 digital 0-7 ARDUINO®
CN8 analog 0-5 ARDUINO®
CN6 power ARDUINO®
CN10 MORPHO
CN7 MORPHO
CN15 USB_STLINK
U8 STLINK MCU
LD6 STLINK Status
LD1, LD2, LD3 user LEDs
B1, B2, B3 user push-buttons
B4 Reset push-button
Connector Footprint for
external battery (optional)
LD4 STLink power fault LED
LD5 5V-enable LED
JP1 5V-source selector
JP2 VDD jumper
JP4 VDDRF jumper
JP6 VDDSMPS jumper
JP3 VDD_MCU jumper
JP5 STLINK jumpers
CN1 USB_MCU

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Hardware layout and configuration
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Figure 5. NUCLEO-WB55RG PCB bottom side
ST Restricted
CN15 USB_STLINK SW5 Switch for external power supply
Footprint for CR2032 battery socket
(optional: not assembly by default)
CN1 USB_MCU