ST P-NUCLEO-WB55 User manual

April 2019 UM2435 Rev 2 1/48
1
UM2435
User manual
Bluetooth®Low Energy and 802.15.4 Nucleo pack
based on STM32WB Series microcontrollers
Introduction
The Nucleo pack (P-NUCLEO-WB55) with a Nucleo-68 board and a USB dongle provides
an affordable and flexible way for users to try out new concepts and build prototypes using
STM32WB microcontrollers with a 2.4 GHz radio interface.
This circuit block provides various combinations of performance, power consumption and
features. A 2.4 GHz RF transceiver supporting Bluetooth®specification v5.0 and IEEE
802.15.4-2011 PHY and MAC is supported.
Arduino™ Uno V3 connectivity and ST morpho headers allow the user to easily expand the
functionality of the Nucleo open development platform with a wide choice of specialized
shields.
The boards are based on a multiprotocol wireless 32-bit microcontroller, based on an Arm®
Cortex®-M4 with FPU, featuring Bluetooth®Low Energy and 802.15.4 radio solution.
The STM32 Nucleo-68 board does not require any separate probe, as it integrates the
ST-LINK/V2-1 debugger/programmer. The board comes with the comprehensive free
STM32 software libraries and examples available with the STM32Cube package.
The USB dongle can be programmed through USB BootLoad or USB DFU. It is also
possible to debug/program it with an external STLink V2 (not delivered), using the SWD
interface.
www.st.com

Contents UM2435
2/48 UM2435 Rev 2
Contents
1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.1 Nucleo-68 board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.2 USB dongle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.3 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3.1 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3.2 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3.3 Default boards configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.4 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.5 Power supply and selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.5.1 External power supply input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.5.2 External power supply output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.5.3 Internal power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.6 Programing/debugging when the power supply
is not from USB ST-LINK (5V_ST_link) . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.7 OSC clock sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.7.1 LSE: OSC 32 kHz clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.7.2 OSC clock supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.8 Reset sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.9 Virtual COM port: LPUART/USART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.10 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

UM2435 Rev 2 3/48
UM2435 Contents
3
7.11 Push buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.12 Current measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.13 Jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.1 USB ST-LINK micro-B connector CN15 . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2 Arduino™ Uno revision 3 connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.3 ST Morpho connectors CN7 and CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.4 Extension connectors CN1 and CN2 on USB dongle . . . . . . . . . . . . . . . 41
Appendix A Nucleo-68 and USB dongle MCU IO assignment . . . . . . . . . . . . . . 42
9 Federal Communications Commission (FCC) and
Industry Canada (IC) compliance statements . . . . . . . . . . . . . . . . . . . . 45
9.1 FCC compliance statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.2 IC compliance statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

List of tables UM2435
4/48 UM2435 Rev 2
List of tables
Table 1. Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 2. Example of codification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 3. Jumper and SB ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 4. Default jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 5. Power sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 6. SB25 bypass USB PWR protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 7. LPUART1 and USART1 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 8. Configuration of jumpers and solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 9. USB STLINK micro-B pinout (connector CN15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 10. Arduino™ connectors pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 11. IO assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 12. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

UM2435 Rev 2 5/48
UM2435 List of figures
5
List of figures
Figure 1. Nucleo-68 and USB dongle boards (top view on the left, bottom view on the right). . . . . . . 7
Figure 2. Nucleo-68 hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 3. Nucleo-68 board (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. Nucleo-68 board (bottom view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. Nucleo-68 board mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6. Nucleo-68 board schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7. Nucleo-68 board schematics - RF part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8. Nucleo-68 board schematics - Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 9. Nucleo-68 board schematics - Power management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 10. Nucleo-68 board schematics - ST-Link/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 11. USB dongle hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 12. USB dongle board (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 13. USB dongle board (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 14. USB dongle mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15. USB dongle schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 16. USB composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 17. ST-LINK debugger: JP1 configuration for on-board MCU . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 18. JP1[7-8]: 5V_STL power source. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 19. JP1[3-4]: 5V_VIN power source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 20. JP1[5-6]: 5V_USB_MCU power source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 21. USB STLINK micro-B connector CN15 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 22. Arduino™ connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 23. Arduino™ connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 24. ST-Morpho connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 25. Extension connectors pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Features UM2435
6/48 UM2435 Rev 2
1 Features
The Nucleo-68 pack uses STM32WB 32-bit microcontrollers, based on Arm®(a) Cortex®
processor(s).
Nucleo-68
•STM32WB microcontroller in VFQFNP68 package
•2.4 GHz RF transceiver supporting Bluetooth®specification v5.0 and
IEEE 802.15.4-2011 PHY and MAC
•Dedicated Arm®32-bit Cortex®M0+ CPU for real-time Radio layer
•SMPS significantly reduces power consumption in Run mode
•Three user LEDs shared with Arduino™
•Four push-buttons
•32.768 KHz LSE crystal oscillator
•32 MHz crystal oscillator with integrated trimming capacitors
•Board expansion connectors:
– Arduino™ Uno V3
–STMorpho
•Flexible board power supply: ST-LINK/V2-1 USB VBUS and external sources
•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 a variety of
examples, as part of the STM32Cube package
•Comprehensive free software libraries and examples available with the STM32Cube
package
•Support of a wide choice of integrated development environments (IDEs) including
IAR™, Keil®, GCC-based IDEs, Arm®Mbed™
a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

UM2435 Rev 2 7/48
UM2435 Features
47
USB dongle
•STM32WB microcontroller in UFQFPN48 package
•2.4 GHz RF transceiver supporting Bluetooth®specification v5.0 and
IEEE 802.15.4-2011 PHY and MAC
•Dedicated Arm®32-bit Cortex®M0+ CPU for real-time Radio layer
•SMPS significantly reduces power consumption in Run mode
•32.768 KHz LSE crystal oscillator
•32 MHz crystal oscillator with integrated trimming capacitors
•Full Bluetooth®solution with integrated PCB antenna for fast connection
•Switch for boot management
•User push button
•Three user LEDs
Figure 1. Nucleo-68 and USB dongle boards (top view on the left, bottom view on the right)
Note: Pictures are not contractual.

Product marking UM2435
8/48 UM2435 Rev 2
2 Product marking
Evaluation tools marked as “ES” or “E” are dedicated for evaluation purpose only, and not
qualified to be used as reference design or in production. Any consequences deriving from
such usage will not be at ST charge. In no event, ST will be liable for any customer usage of
these engineering sample tools as reference design or in production.
“E” or “ES” marking examples of location:
•on the targeted MCU soldered on the board (for illustration of STM32WB marking, refer
to the section “Package characteristics” of the datasheet)
•next to the evaluation tool ordering part number, stuck or silk-screen printed on the
board.
3 System requirements
•Windows®OS (XP, 7, 8 or 10) or Linux 64-bit or Mac OS X
•USB Type-A to Micro-B cable
4 Development toolchains
•Arm®Keil®: MDK-Arm™(a)
•IAR™: EWARM(a)
•GCC-based IDEs including free SW4STM32 from AC6
•Arm®mbed™ online
5 Demonstration software
The demonstration software is preloaded in the Flash memory of the STM32WB
microcontroller 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 the www.st.com/stm32nucleo webpage.
a. On Windows®only.

UM2435 Rev 2 9/48
UM2435 Ordering information
47
6 Ordering information
To order the Nucleo-68 board corresponding to the targeted STM32 MCU refer to Ta ble 1.
The STM32WB55 codification is explained with an example in Table 2.
Table 1. Ordering information
Order code Target MCU
P-NUCLEO-WB55 STM32WB55RG (Nucleo-68)
STM32WB55CG (USB dongle)
Table 2. Example of codification
STM32WB55RG Description
STM32WB 32-bit microcontroller, based on Arm®Cortex®processor(s)
WB Wireless Bluetooth®and 802.15.4
55 Die 5, 1 Mbyte of Flash memory, 256 Kbytes of SRAM, full set of features
R Number of pins (R = 68)
G Memory size (G = 1 Mbyte)

Hardware layout and configuration UM2435
10/48 UM2435 Rev 2
7 Hardware layout and configuration
7.1 Nucleo-68 board
The Nucleo-68 board is designed around the STM32WB55RG microcontroller in a 68-pin
VFQFPN68 package.
The hardware block diagram (see Figure 2) illustrates the connection between the MCU and
peripherals (STLINK/V2-1, push buttons, LEDs, Arduino™ UNO V3 connectors and
ST-Morpho connectors).
Figure 3 and Figure 4 help the user to locate these features on the board.
Figure 2. Nucleo-68 hardware block diagram
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UM2435 Rev 2 11/48
UM2435 Hardware layout and configuration
47
Figure 3. Nucleo-68 board (top view)

Hardware layout and configuration UM2435
12/48 UM2435 Rev 2
Figure 4. Nucleo-68 board (bottom view)

UM2435 Rev 2 13/48
UM2435 Hardware layout and configuration
47
Figure 5. Nucleo-68 board mechanical drawing

Hardware layout and configuration UM2435 14/48 UM2435 Rev 2
Figure 6. Nucleo-68 board schematics
R7
1K
SW1
User PB
R4
680
LED3
LED RED
R3
680
LED2
LED GREEN
R2
680
LED1
LED BLUE
R8
1K
SW2
User PB
R9
1K
SW3
User PB
AT2
AT3
SB22 Open
SB23 Open
PA13
PA14
PA15
PB3
PB4
USB_N
USB_P
GND
GND
GND
GND
GND
GND
SWD reserved
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC10
PC11
PC12
PC13
PD0
PD1
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
PA10
PB2
PB5
PB6
PB7
PB8
PB9
PB10
PB11
PB12
PB13
PB14
PB15
AT2
AT3
SW4
Reset PB
Not Fitted
R5
D1
BAT54KFILM
GND
GND
1
2
3
4
5
CN3
HEADER_1X5
GND
NRST
GND
C7
10pF
C3
100nF
GND
C6
10pF
X2
NX2012_32K768
GND
Not Fitted
C4
GND
Not Fitted
C5
X1
NX2016_32M
BOOT0
GND
R6
10K
VDD_MCU
Production Test Pins
Reserved
A2
D12
D11
D13
D2
D7
D8
A4
A5
D9
D0
D1
A0
A1
D14
D15
D4D3
D5
D6
SWO
OSC_IN
OSC_OUT
PC14
PC15
A3
D10A
D10B
PB5
PB1
PB0
PB1
PB0
PC4
PD0
PD1
SB43
Open
SB44 Open
SB45
Open
SB46 Open
GND
SB47 Close
SB48 Open
PC13
PA0
15
PA1
16
PA2
17
PA3
18
PA4
19
PA5
20
PA6
21
PA7
22
PA8
23
PA9
24
PC4 25
PC5 26
PB2
27
PB10
28
PC0 9
PC1 10
PC2 11
PC3 12
PB8
6
PB9
7
PC13 2
PB11
29
PB12
46
PB13
47
PB14
48
PB15
49
PC6 50
PA10
51
PA11
52
PA12
53
PA13-JTMS_SWDIO
54
PA14-JTCK_SWCLK
56
PA15-JTDI
57
PC10 58
PC11 59
PC12 60
PD0 61
PD1 62
PB3-JTDO
63
PB4-NJTRST
64
PB5
65
PB6
66
PB7
67
PB1
39 PB0
38
PE4 40
U1E
STM32WBxx_QFN68
OSC_IN
35
OSC_OUT
34
PC14-OSC32_IN
3
PC15-OSC32_OUT
4
PH3-BOOT0 5
AT0 36
AT1 37
NRST 8
U1C
STM32WBxx_QFN68
PE4

UM2435 Hardware layout and configuration
UM2435 Rev 2 15/48
Figure 7. Nucleo-68 board schematics - RF part
36
STM32WB55RG RF part
Title:
Size:
Reference:
Sheet: ofA4
Revision:
Project: NUCLEO-WB55.Nucleo
MB1355C 01-RC1
12-Jun-2017
[No Variations]
Date:
-
Variant:
GND
GND
GND
J2
SMA
ANT
RF switch Antenna Matching Network
A
N
T
G
N
D
J
2
S
M
A
Meander Antenna
2.4GHz
(see AN3359 on www.st.com)
PCB Antenna
To connect 50ohms Antenna
or
To connect 50ohms Instrument
(Cx populated and Cy not fitted)
Default value PCB Antenna
GND GND
Antenna Matching Network (for SMA Antenna)
G
N
D
G
N
D
Filter (for Eval/debug)
Patch trought (for Direct Connection)
GND
GND
GND
VDD
12
JP4
HEADER_1X2
C33
100nF
C34
100pF
C35
10nF
Not Fitted
C38
Not Fitted
C36
GRM1555C1H1R2WA01D
C37
1.2pF
Not Fitted
C39 Not Fitted C40
L4
0R
LQG15HS3N6S02
L3
3.6nH
JP4(1-2)
JMP4
Jumper 2.54mm
RF1 31 VDDRF
33
VSSRF
32
U1A
STM32WBxx_QFN68
GND
SC1
GND
SC2
GND
SC3
GND
SC4
Socket for Metallic Shield
SH1
Shield 17.2x17.2x3
1 3
2
FLT1
LFB182G45CGFD436
GND
LQG15HS2N7S02
L5 2.7nH
GRM1555C1HR80BA01D
C1
0.8pF
GND
Band Pass Filter
L
Q
G
1
5
H
S2
N
7
S0
2
L
5
2
.
7
n
H
G
R
M
1
5
5
5
C
1
H
R
8
0
B
A
0
1
D
C1
0
.8
p
F
G
N
D
50 Ohms Matching Network
GRM1555C1HR30WA01D
C2
0.3pF
GND
(Compents values will be updated after evaluation)

Hardware layout and configuration UM2435 16/48 UM2435 Rev 2
Figure 8. Nucleo-68 board schematics - Connectors
VDD 5V_EXT
Morpho connectors
GND
GND
GNDGND
2
4
6
8
10
12
1
3
5
7
9
11
1413
1615
1817
2019
2221
2423
25 26
27 28
29 30
31 32
33 34
35 36
37 38
CN7
HEADER_2X19_M
2
4
6
8
10
12
1
3
5
7
9
11
1413
1615
1817
2019
2221
2423
25 26
27 28
29 30
31 32
33 34
35 36
37 38
CN10
HEADER_2X19_M
USB_N
USB_P
R1
100K
GND
GND
VIN
3V3
3V3
5V
AVDD
GND
USB_N
USB_P
STM32WB55 USB Connector
NRST
VBUS 1
DM 2
DP 3
ID 4
GND 5
Shield 6
MicroB
CN1
1050170001
GND
BOOT0
VBAT
5V_USB_MCU
5V_USB_MCU
3V3
5V
VIN
AVDD
Arduino Shield Connectors
GND
GND
1
2
3
4
5
6
7
8
CN6
HEADER_1X8_F
1
2
3
4
5
6
7
8
CN9
HEADER_1X8_F
1
2
3
4
5
6
CN8
HEADER_1X6
1
2
3
4
5
6
7
8
9
10
CN5
HEADER_1X10
GND
3V3
NRST
A5
A0
A1
A2
A3
A4
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
AVDD
GND
GND
GND
VIN
5V
3V3
NRST
IOREF
OSC_IN
OSC_OUT
PC14
PC15
PC13
PC13
PB8
PB8
PB9
PB9
PC0
PC0
PC1
PC1
PC2
PC2
PC3
PC3
PA0
PA0
PA1
PA1
PA2
PA2
PA3
PA3
PA4
PA4
PA5
PA5
PA6
PA6
PA7
PA7
PA8
PA8
PA9
PA9
PB10
PC6
PC6
PA10
PA10
PA15
PA15
PC10
PC10
PC12
PC12
USB_N
USB_P
SB2
Open
SB4
Open
PA13
PA14
SB14
Close
SB16Open
PB6
SB15
Close
SB18
Open
PC11
PA10
SB1
Close
SB3
Open
SB8
Close
PA9
SB10
Open
SB5
Close
SB6
Open
PB10
PB12
PB13
PB3
SB12
Close
SB13
Open
PB14
PB15
SB9
Close
SB11
Close
PB4
PB5
SB7
Open
PB6
SB17
Close
PB7
PD0
PD1
PB0
PB1
PC4
PC5
PB2PB11
1
34
5
6
2
U6
USBLC6-2SC6
GND
5V_USB_MCU
SB41
Close
SB42
Open
5V_INT
R33
1K
PE4

UM2435 Hardware layout and configuration
UM2435 Rev 2 17/48
Figure 9. Nucleo-68 board schematics - Power management
56
Power Management
Title:
Size:
Reference:
Sheet: ofA4
Revision:
Project: NUCLEO-WB55.Nucleo
MB1355C 01-RC1
12-Jun-2017
[No Variations]
Date:
-
Variant:
VIN
3V35V VDD
C23
4.7uF
C29
4.7uF
VDD
VDD_MCU
VDD_MCU
VDD_MCU
VDD_MCU
C20
100nF
C17
100nF
C19
100nF
C18
100nF
C28
100nF
C31
100nF
C32
100nF
GND
GND
GND
GND
GND
GND
GND GND GNDGND
GND
SB31
Open
0805
GND
GND
GNDGNDGND
GND
GND GND
SB32 Close
VBAT
VDD_MCU
SB26
Close
SB29
Open
Open when SMPS=ON
Close when SMPS=OFF
Close when VBAT
connected to VDD_MCU
Close when Board supplied by Li Battery
Open when Board supplied by Li Battery
5V_USB_STLINK
5V_USB_MCU
5V_EXT
3V3_STLINK
PWR_ENn
2
4
6
8
1
3
5
7
JP1
HEADER_2X4
SB25 Open
Supply Sources
(Warning:
1 2
JP2
HEADER_1X2
1 2
JP3
HEADER_1X2
3V3 LDO dedicated to ST_Link
FW configuration needed)
MCU Supply domain
SMPS domain
Commun Supply Parts
VDD
SB34
Close
SB33
Open
3V3
VBAT
SB30
Open
SB35
Close
1
2
Not Fitted
CN4
HEADER_1X2
GND
SB27Open
SB28
Open
SB24
Open
1
2
CN11
1
2
CN12
GND GND
GND
GND
C24
100nF
GND
C8
100nF/25V
GND
C12
100nF
GND C14
100nF
GND
C16
100nFC15
1uF/X5R
R10
1K C13
1uF/X5R
C21
1uF/X5R
C22
1uF/X5R
C25
100nF
C26
100nF
C27
100nF
GND
GND GND GND
GND
GND
L2
FCM1608KF-601T03
R11
10K
R12
1K
LED4
LED RED
LED5
LED RED
Vin
3Vout 2
Gnd
1
U2 LD1117S50TR
46
2
GND
1
3
PG
EN
VIN VOUT
7
U3
LD39050PU33R
GND
Arduino
Morpho
Ground for Probing
5V_USB_STLINK
+1 -
2
Socket
CR2032
SK_BT1
CR2032-SCK1B
CR2032
BT1
CR2032-BAT1
JP1(7-8)
JMP1
Jumper 2.54mm
JP2(1-2)
JMP2
Jumper 2.54mm
JP3(1-2)
JMP3
Jumper 2.54mm
51
2
GND
3
4
BYPASS
INH
VIN VOUT
U5 LD3985M33R
C10
10uF/25V
C11
4.7uF/10V
C9
10uF/25V
AVDD SB49
Open
SB50
Close
SB51
Open
VDD
VDD_MCU
VDDSMPS
44
VSSSMPS
42
VLXSMPS
43
VFBSMPS
41
V
D
D
S
MP
S
V
S
SSMP
S
V
L
X
S
MP
S
V
F
BSMPS
U1B
STM32WBxx_QFN68 VREF+
13
VDDA
14
VDD
30
VDD
45
VDDUSB
55
VBAT
1
VDD
68
VSS (ExPAD)
69
U1D
STM32WBxx_QFN68
12
JP6 JP6(1-2)
JMP12
Jumper 2.54mm
5V_INT
L1
10uH
TAB1
TAB_CR2032
GND 2
IN
5
EN
4
OUT 1
FAULT
3
U4
STMPS2141STR
GND

Hardware layout and configuration UM2435 18/48 UM2435 Rev 2
Figure 10. Nucleo-68 board schematics - ST-Link/V2-1
66
ST-Link/V2-1
Title:
Size:
Reference:
Sheet: ofA4
Revision:
Project: NUCLEO-WB55.Nucleo
MB1355C 01-RC1
12-Jun-2017
[No Variations]
Date:
-
Variant:
USBSTLK_N
T_SWCLK
T_SWDIO
T_NRST
AIN_1
5V_USB_STLINK
Board Ident: PC13=0
T_SWDIO_IN
LED_STLK
STLK_RX
STLK_TX
T_SWO
Red
_Green
2 1
3 4
LED6
HSMF-A201-A00J1/KAA-3528SURKCGKC
USB_RENUMn
3V3_STLINK
3V3_STLINK
3V3_STLINK
3V3_STLINK
3V3_STLINK
3V3_STLINK
3V3_STLINK
3V3_STLINK
3V3_STLINK
A1
1
A2
3
A3
4
A4
5
A5
6
A6
7
A7
8
A8
9
OE
10
GND
11
B8 12
B7 13
B6 14
B5 15
B4 16
B3 17
B2 18
VCCB 19
VCCA 2
B1 20
U7
TXS0108EPW VBUS
1
DM
2
DP
3
ID
4
GND
5
Shield
6
MicroB
CN15
1050170001
R23
100K
GNDGND
GND
R16
10K
R17
100
R20
36K
5V_USB_STLINK
2
GND
3
4
Vcc 5
U10
74LVC1G07
NRST
R18
10K
Not Fitted
R22
10K
GND
GND
R24
100K
R28
4K7
GND
R26
4K7
Not Fitted
R30
GND
R29
100
R21
1K5
T_SWDIO
GND
T_SWCLK
GND
GND
GND GND
GND GND GND GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
T_SWO
3V3_STLINK
PB6 PB7
STLK_TX
STLK_RX
3V3_STLINK
PA13 PA14
SWO
SWCLK
SWDIO
TX_STlink (VCP)
RX_STlink (VCP)
T_SWO
PB3
STLK_SWCLK STLK_SWDIO
STLK_RST
SWD STM32F103
D2
BAT60JFILM
5V
SB37
Open
R14
2K7
R15
4K7
GND
3V3_STLINK
3V3_STLINK
SB38
Close
SB39
Close
SB40
Open
T_SWDIO
T_SWCLK
USART2
of STM32F103
TX
RX 1
2
CN14
R19
100K
R25
100/2K7
R27
100/100
GND
3V3_STLINK
2 4 6 8 10 12
1 3 5 7 9
11
1413 1615
JP5
GND
GNDVDD
STLK_SWDIO
T_SWCLK
T_VDD
SB36
Close
PWR_EXT
STLK_RST
1
34
5
6
2
U9
USBLC6-2SC6
GND
5V_USB_STLINK
1
2
3
4
5
6
Not Fitted
CN13
HEADER_1X6
SWDIO
SWCLK
SWO
NRST
VREF
GND
C42
100nF
C41
100nF
C43
100nF
C46
100nF
C44
20pF
C45
20pF
C47
100nF
C48
100nF
C49
100nF
C50
100nF
VBAT
1
PA7
17
PC13
2
PA12 33
PC14
3
PB0
18
PC15
4JTMS/SWDIO 34
OSCIN
5
PB1
19
OSCOUT
6
VSS_2 35
NRST
7
PB2/BOOT1
20
VSSA
8
VDD_2 36
VDDA
9
PB10
21
PA0
10
JTCK/SWCLK 37
PA1
11
PB11
22
PA2
12
PA15/JTDI 38
PA3
13
VSS_1
23
PA4
14
PB3/JTDO 39
PA5
15
VDD_1
24
PA6
16
PB4/JNTRST 40
PB12 25
PB5 41
PB13 26
PB6 42
PB14 27
PB7 43
PB15 28
BOOT0 44
PA8 29
PB8 45
PA9 30
PB9 46
PA10 31
VSS_3 47
PA11 32
VDD_3 48
U8
STM32F103CBT6
PWR_ENn
T_VDD
3V3_STLINK
R32
100K
R31
10
JMP5 Jumper 2.54mm
JMP6 Jumper 2.54mm
JMP7 Jumper 2.54mm
JMP8 Jumper 2.54mm
JMP9 Jumper 2.54mm
JMP10 Jumper 2.54mm
JMP11 Jumper 2.54mm
JP5(3-4 to 15-16)
Q1
2N2222
USBSTLK_P
GND
T_VDD
NRST
X3
X3225-8MHz

UM2435 Rev 2 19/48
UM2435 Hardware layout and configuration
47
7.2 USB dongle
The USB dongle is designed around the STM32WB55CG microcontroller in a 48-pin
UFQFPN48 package.
The hardware block diagram in Figure 11 illustrates the connection between the MCU and
the peripherals (STLINK/V2-1, push buttons, LEDs, Arduino™ UNO V3 connector and
ST-Morpho connectors).
Figure 12 and Figure 13 help the user locate these features on the board.
Figure 11. USB dongle hardware block diagram
069
670:%&*
26&B
N+]
FU\VWDO
*3,2V
/('
*3,2
&1
*3,2V
&1
6:6:
26&B
0+]
FU\VWDO
5)
86%
86%
7\SH$
FRQQHFWRU
/(' /('
*3,2V
069
3&%DQWHQQD

Hardware layout and configuration UM2435
20/48 UM2435 Rev 2
Figure 12. USB dongle board (top view)
Figure 13. USB dongle board (bottom view)