ST NUCLEO-WB15CC User manual

Introduction
The NUCLEO-WB15CC STM32WB Nucleo-64 board based on the MB1641 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.
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-WB15CC top view
Picture is not contractual.
STM32WB Nucleo-64 board (MB1641)
UM2823
User manual
UM2823 - Rev 1 - July 2021
For further information contact your local STMicroelectronics sales office.
www.st.com

1Features
• STM32WB15CC (320-Kbyte Flash memory, 48-Kbyte SRAM, in VFQFPN48 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, and Mbed Studio
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
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Features
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2Ordering information
To order the NUCLEO-WB15CC 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-WB15CC MB1641 STM32WB15CC
2.1 Codification
The meaning of the codification is explained in Table 2.
Table 2. Codification explanation
NUCLEO-XXRYTZ Description Example: NUCLEO-WB15CC
XX MCU series in STM32 32-bit Arm Cortex MCUs Wireless Bluetooth® STM32WB Series
Y Product line in the Series STM32WBx5 product line
RProduct‑specific in the product line:
• 1: Die 1, full set of features STM32WB15 MCU family
TSTM32 package pin count:
• C for 48 pins 48‑pin package
ZSTM32 Flash memory size:
• C for 320 Kbytes 320‑Kbyte Flash memory
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3Development 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
• Arm® - Mbed Studio(2) (3)
1. On Windows® only.
2. Arm and Mbed are registered trademarks or trademarks of Arm Limited (or its subsidiaries) in the US and or elsewhere.
3. Refer to the os.mbed.com website and to the “Ordering information” section to determine which order codes are supported.
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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Development environment
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4Conventions
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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Conventions
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5Safety 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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6Quick start
This section describes how to quickly start development using NUCLEO-WB15CC.
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-WB15CC product location.
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7Hardware layout and configuration
The NUCLEO-WB15CC Nucleo-64 board is designed around the STM32WB15CC microcontroller. The hardware
block diagram in Figure 2 illustrates the connection between NUCLEO-WB15CC 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-WB15CC board. The mechanical
dimensions of the NUCLEO-WB15CC product are shown in Figure 6.
Figure 2. Hardware block diagram
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Figure 3. NUCLEO-WB15CC PCB top side
Figure 4. NUCLEO-WB15CC PCB with details of the main part (SoC and RF)
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Figure 5. NUCLEO-WB15CC PCB bottom side
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Figure 6. NUCLEO-WB15CC mechanical dimensions (in millimeters)
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7.1 Power supply
7.1.1 General description
By default, the STM32WB15CC microcontroller embedded on this Nucleo board is supplied by 3V3 but the board
proposes a lot of possibilities to supply the device. The 3.3 V can first come from the ST-LINK USB, ARDUINO®,
or ST morpho connectors. Moreover, the STM32WB15CC can be supplied by an external source, between 1.8
and 3.3 V. Thanks to the level shifter, the debug by embedded ST-LINK is always possible even if the supply
voltage of the target is different from 3V3 (ST-LINK supply). Figure 7 shows the power tree. Moreover, this figure
also shows the default state of the jumpers and the solder bridges.
Figure 7. NUCLEO-WB15CC power tree
7.1.2 7 to 12 V power supply
NUCLEO-WB15CC can be powered with a 7 to 12 V DC power source. There are three accesses for this type of
DC levels:
1. VIN CN6 pin 8 of the ARDUINO® connector. It is possible to apply until +12 V on this pin or use an
ARDUINO® shield which can deliver this type of voltage on the VIN pin.
2. VIN CN7 pin 24 of the ST morpho connector. It is possible to apply until +12 V on this pin like for the
ARDUINO® connection.
3. CN4 external input. In this case, pay attention to the setting of the jumpers and solder bridges which is very
important. Refer to Table 4.
These sources are connected to the U2 linear low drop voltage regulator. The 5 V output of this regulator is a
potential source of 5V. Refer to Section 7.1.3 for further details.
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7.1.3 5 V power supply
NUCLEO-WB15CC can be powered with a 5 V DC power source. The 5 V can come from several connectors:
1. 5V_USB_STLK connected to CN11 (default configuration for the supply of the board). This connector is
dedicated to the access of ST-LINK/V2 and Virtual COM port and therefore can get supply from the host
computer. It is also possible to connect a USB charger to this connector. In this case, the ST-LINK and the
VCP cannot be accessible.
2. CN4 external input. In this case, pay attention to the setting of the jumpers and solder bridges which is very
important. Refer to Section 7.1.2 for more details.
3. 5V_EXT CN7 pin 6 of ST morpho connector.
4. 7-12V input through the U2 voltage regulator. Refer to Section 7.1.2 for further details.
The JP1 jumper selects the 5V source. Table 4 shows the configuration versus the selected source.
Depending on the current needed by the devices connected to the USB port, and the board itself, power
limitations can prevent the system from working as expected. The user must ensure that the NUCLEO-WB15CC
is supplied with the correct power source depending on the current needed.
Table 4. JP2 power supply selector description
Jumper /
Solder bridge Setting Configuration
JP1
5V supply source
selector
Default setting
NUCLEO-WB15CC is supplied through the
CN15 Micro-B USB receptacle (USB ST-LINK)
NUCLEO-WB15CC is supplied through the CN6
pin 8 (ARDUINO®) or CN7 pin 24 (ST morpho) or
CN4 (Refer to configuration details in the present
power supply section).
NUCLEO-WB15CC is supplied through CN7
pin 6 directly.
When 5V_USB_STLINK is used, JP1 is set on [7-8]. The sequence is specific. In the beginning, only STM32F103
is supplied. If the USB enumeration succeeds, the 5V_USB_STLNK power is enabled by asserting the PWR_ENn
signal from STM32F103CBT6. This pin is connected to a TPS2041C power switch which supplies the rest of the
board. This power switch also features a current limitation to protect the host PC in case of currents exceeding
300 mA.
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7.1.4 Current measurement
As the device has low power features, it can be interesting to measure the current consumed by NUCLEO-
WB15CC. To easily do this measurement, there are two possibilities:
1. Measure the supply current of the SoC using an ammeter in place of the JP1 jumper. In this case, all
supply sources can be used except the AVDD coming from the ARDUINO® connector. Figure 8 shows the
configuration.
Figure 8. Current measurement with an ammeter
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2. Use an external power supply with current measurement capabilities. In this case, the JP2 jumper must be
removed, and the supply connected to JP2 pin 2, as shown in Figure 9. The supply voltage must be between
1.8 and 3.3 V. AVDD input (CN1 pin 8) must not be used during this measurement.
Figure 9. Current measurement with an external power supply
7.2 Clock sources
7.2.1 HSE clock reference
The accuracy of the HSE high‑speed clock of the SoC is committed to a 32 MHz crystal oscillator. The HSE
oscillator is trimmed during board manufacturing.
7.2.2 LSE clock reference
The accuracy of the LSE low‑speed clock of the SoC is committed to a 32.768 kHz crystal oscillator.
7.3 Reset sources
The NUCLEO-WB15CC reset signal is active LOW. The internal pull-up resistor forces the RST signal to a high
level.
The sources of reset are:
• B4 reset push button
• Embedded ST-LINK/V2-1
• CN2 ARDUINO® connector pin 3 (ARDUINO® board reset).
• CN7 ST morpho connector pin 14
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7.4 Embedded ST-LINK/V2-1
The ST-LINK/V2-1 programming and debugging tool is integrated into the NUCLEO-WB15CC Nucleo-64 board.
For information about debugging and programming features, refer to the user manual ST-LINK/V2 in-circuit
debugger/programmer for STM8 and STM32 (UM1075), which describes in detail all the ST-LINK/V2 features.
The additional features supported on the ST-LINK/V2-1 are:
• USB software re-enumeration
• Virtual COM port interface on USB
• Mass storage interface on USB
• USB power management request for more than 100 mA power on USB (limited to 300 mA for this board)
The following features are no more supported on the ST-LINK/V2-1:
• Application voltage lower than 3 V
7.4.1 Drivers
The ST-LINK/V2-1 requires a dedicated USB driver, which, for Windows 7®and Windows 8®, is found at
www.st.com. For Windows 10®, it is not necessary to install the driver, as the ST-LINK is automatically identified.
In case the NUCLEO-WB15CC Nucleo-64 board is connected to the PC before the driver is installed, some
board interfaces may be declared as “Unknown” in the PC device manager. In this case, the user must install
the dedicated driver files, and update the driver of the connected device from the device manager as shown in
Figure 10.
Note: Prefer using the “USB Composite Device” handle for a full recovery.
Figure 10. USB composite device
7.4.2 ST-LINK/V2-1 firmware upgrade
The ST-LINK/V2-1 embeds a firmware upgrade mechanism for the in-situ upgrade through the USB port. As the
firmware may evolve during the lifetime of the ST-LINK/V2-1 product (for example new functionalities, bug fixes,
support for new microcontroller families), it is recommended to visit the www.st.com website before starting to use
the NUCLEO-WB15CC Nucleo-64 board and periodically, to stay up-to-date with the latest firmware version.
7.4.3 CN15 ST-LINK/V2-1 USB connector
The main function of this connector is the access to ST-LINK/V2-1 embedded on NUCLEO-WB15CC for
programming and debugging purposes as explained above. It can supply the board (Refer to Section 7.1 Power
supply).
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The connector is a standard USB Micro-B connector.
Table 5. USB Micro-B connector CN23 (front view)
Pin
number Pin name Signal name Functions
1 VBUS 5V_USB_ST_LINK VBUS Power
2 DM USB_STLK_N DM
3 DP USB_STLK_P DP
4 ID - -
5 GND GND GND
7.4.4 Virtual COM port: USART1
ST-LINK/V2-1 offers a USB Virtual COM port bridge. This feature gives access to the USART1 of the
STM32WB15CC by the CN15 USB ST-LINK connector.
By default, this USART1 interface of STM32WB15CC is connected to the UART2 port of the ST-LINK/V2-1 MCU
(STM32F103).
This VCP can be used differently with an intermediate connection. On the CN14 connector both TX and RX
signals are available and two solder bridges can disconnect the UART coming from SoC.
Table 6. UART interface pinout description
Name I/O Wake-up available
USART1 RX (PA10/pin 36) Pin 1 STLINK_TX: UART2 TX (PA2/pin 12)
USART1 TX (PA9/pin 18) Pin 2 STLINK_RX: UART2 RX (PA3/pin 13)
7.4.5 Level shifter
NUCLEO-WB15CC has a system to supply STM32WB15CC with a different voltage than ST-LINK. The ST-LINK
is always supplied by 3.3 V sources. By default, STM32WB15CC is supplied by the same voltage value as
ST-LINK, but it is possible to supply the SoC with another value. It accepts a voltage between 1.8 and 3.3 V trust
to a level shifter. This specific component assures the voltage conversion between the ST-LINK and the SoC. It
drives SWD and UART signals connected to VCP on ST-LINK.
7.4.6 JP5 multi‑function jumper
The JP5 multi‑function jumper can connect ST-LINK/V2-1 to STM32WB15CC. It is located between the level
shifter and the SoC. It is referenced to the VDD domain (STM32WB15CC supply voltage domain).
Figure 11. Interconnection bloc diagram between STM32WB15CC and ST-LINK/V2-1
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Table 7. Multi-function jumper pinout description
STM32WB15CC JP5 STM32F103 (ST-LINK)
GND 1-2 GND
NRST (pin 7) 3-4 T_NRST (PB0/pin 18)
SWDIO (PA13/pin 39) 5.6 T_SWDIO (PB12-PB14/pin 25-pin 27)
SWCLK (PA14/pin 41) 7-8 T_SWCLK (PA5-PB13/pin 15-pin 26)
SWO (PB3/pin 43) 9-10 T_SWO (PA10/pin 31)
VDD 11-12 T_VDD
USART1 TX (PA9/pin 18) 13-14 STLINK_RX: UART2 RX (PA3/pin 13)
USART1 RX (PA10/pin 36) 15-16 STLINK_TX: UART2 TX (PA2/pin 12)
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7.5 LEDs
Six LEDs on the top side of the Nucleo board help the user during the application development.
Figure 12. LEDs location
1. LD1: this blue LED is available for user application.
2. LD2: this green LED is available for user application.
3. LD3: this red LED is available for user application.
4. LD4: this LED turns red to indicate that the current distribution cannot be performed as expected when the
board is supplied by USB_STLINK.
5. LD5: this LED turns green when the 5V is available. To select the 5 V source, refer to Section 7.1.3 for
further details.
6. LD6 is a bi-color LED, which default status is red. It turns to green to indicate that communication is in
progress between the host PC and ST-LINK/V2-1 with the following steps:
– Slow blinking red and OFF: at power-on, before USB initialization
– Fast blinking red and OFF: after the first correct communication between the host PC and ST-LINK/
V2-1 (enumeration)
– Red ON: when initialization between the host PC and ST-LINK/V2-1 is successfully finished.
– Green ON: after successful target communication initialization
– Blinking red and green: during communication with the target
– Green ON: communication is successfully finished and OK.
– Orange ON: communication failure.
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7.6 Push-buttons
7.6.1 Description
NUCLEO-WB15CC provides two types of buttons:
• B1 USER1 pushbutton
• B2 USER2 pushbutton
• B3 USER3 pushbutton
• B4 reset pushbutton to reset the NUCLEO-WB15CC board.
Figure 13. Push-buttons location
7.6.2 Reset push-button
B4 is dedicated to the hardware reset of the NUCLEO-WB15CC board.
7.6.3 User push-buttons
There are three push‑buttons available for the user application. They are connected to PA0, PE4, and PA6. It is
possible to use them for GPIO reading or to wake up the device (only B1).
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