um2435 user manual - stmicroelectronics...april 2019 um2435 rev 2 1/48 1 um2435 user manual...

April 2019 UM2435 Rev 2 1/481

UM2435User manual

Bluetooth® Low Energy and 802.15.4 Nucleo pack based on STM32WB Series microcontrollers

IntroductionThe 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

http://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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107.1 Nucleo-68 board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.2 USB dongle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.3 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237.3.1 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7.3.2 Quick start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7.3.3 Default boards configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7.4 Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257.4.1 Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7.4.2 ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.5 Power supply and selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277.5.1 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327.7.1 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

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7.11 Push buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.12 Current measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.13 Jumper configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

8 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368.1 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 . . . . . . . . . . . . . . . . . . . . 459.1 FCC compliance statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.2 IC compliance statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

List of tables UM2435

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List of tables

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

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

• 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.

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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.

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47

6 Ordering information

To order the Nucleo-68 board corresponding to the targeted STM32 MCU refer to Table 1.

The STM32WB55 codification is explained with an example in Table 2.

Table 1. Ordering informationOrder code Target MCU

P-NUCLEO-WB55STM32WB55RG (Nucleo-68)STM32WB55CG (USB dongle)

Table 2. Example of codificationSTM32WB55RG 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 boardThe 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 Hardware layout and configuration

47

Figure 3. Nucleo-68 board (top view)


12/48 UM2435 Rev 2

Figure 4. Nucleo-68 board (bottom view)

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47

Figure 5. Nucleo-68 board mechanical drawing

Hardw

are layout and configurationU

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Figure 6. Nucleo-68 board schematics

R7

1K

SW1

User PB

R4

680

LED3

LED RED

R3

680

LED2

LED GREEN

R2

680

LED1LED BLUE

R8

1K

SW2

User PB

R9

1K

SW3

User PB

AT2AT3

SB22 Open

SB23Open

PA13PA14

PA15

PB3PB4

USB_NUSB_P

GND

GND

GND

GND

GND

GND

SWD reserved

PC0PC1PC2PC3PC4PC5PC6

PC10PC11PC12PC13

PD0PD1

PA0PA1PA2PA3PA4PA5PA6PA7PA8PA9PA10

PB2

PB5PB6PB7PB8PB9PB10PB11PB12PB13PB14PB15

AT2AT3

SW4

Reset PB

Not FittedR5

D1BAT54KFILM

GND

GND

12345

CN3

HEADER_1X5

GND

NRST

GND

C710pF

C3

100nF

GND

C610pF

X2

NX2012_32K768

GND

Not FittedC4

GND

Not FittedC5

X1NX2016_32M

BOOT0

GND

R610K

VDD_MCU

ProductionTestPinsReserved

A2

D12D11

D13D2

D7D8

A4A5

D9

D0D1

A0A1

D14D15

D4D3

D5

D6

SWO

OSC_INOSC_OUT

PC14PC15

A3

D10A

D10B

PB5

PB1PB0

PB1

PB0

PC4

PD0

PD1

SB43

Open

SB44Open

SB45

Open

SB46 Open

GND

SB47 Close

SB48 OpenPC13

PA015

PA116

PA217

PA318

PA419

PA520

PA621

PA722

PA823

PA924

PC4 25

PC5 26

PB227

PB1028

PC0 9

PC1 10

PC2 11

PC3 12

PB86

PB97

PC13 2

PB1129

PB1246

PB1347

PB1448

PB1549

PC6 50

PA1051

PA1152

PA1253

PA13-JTMS_SWDIO54

PA14-JTCK_SWCLK56

PA15-JTDI57

PC10 58

PC11 59

PC12 60

PD0 61

PD1 62

PB3-JTDO63

PB4-NJTRST64

PB565

PB666

PB767

PB139PB038

PE4 40

U1E

STM32WBxx_QFN68

OSC_IN35

OSC_OUT34

PC14-OSC32_IN3

PC15-OSC32_OUT4

PH3-BOOT0 5

AT0 36

AT1 37

NRST 8U1C

STM32WBxx_QFN68

PE4

UM

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ardware layout and configuration

UM

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15/48

Figure 7. Nucleo-68 board schematics - RF part

3 6

STM32WB55RG RF partTitle:

Size:Reference:Sheet: ofA4

Revision:

Project: NUCLEO-WB55.Nucleo

MB1355C 01-RC112-Jun-2017

[No Variations]

Date:-

Variant:

GND

GND

GND

J2

SMA

ANT

RF switch Antenna Matching Network

ANT

GND

J2

SMA

Meander Antenna2.4GHz(see AN3359 on www.st.com)

PCB Antenna

To connect 50ohms Antennaor

To connect 50ohms Instrument(Cx populated and Cy not fitted)

Default value PCB AntennaGND GND

Antenna Matching Network (for SMA Antenna)

GND GND

Filter (for Eval/debug)Patch trought (for Direct Connection)

GND

GND

GND

VDD

12

JP4HEADER_1X2

C33

100nFC34

100pF

C35

10nF

Not Fitted

C38

Not FittedC36

GRM1555C1H1R2WA01D

C371.2pF

Not FittedC39

Not FittedC40

L4

0R

LQG15HS3N6S02L3

3.6nH

JP4(1-2)

JMP4

Jumper 2.54mm

RF1 31VDDRF33

VSSRF32

U1A

STM32WBxx_QFN68

GND

SC1

GND

SC2

GND

SC3

GND

SC4

Socket for Metallic Shield

SH1

Shield 17.2x17.2x3

1 3

2

FLT1LFB182G45CGFD436

GND

LQG15HS2N7S02L5 2.7nH

GR

M15

55C

1HR

80B

A01

D

C10.8pF

GND

Band Pass Filter

LQG15HS2N7S02L5 2.7nH

GR

M15

55C

1HR

80B

A01

D

C10.8pF

GND

50 Ohms Matching Network

GR

M15

55C

1HR

30W

A01

D

C20.3pF

GND

(Compents values will be updated after evaluation)

Hardw


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Figure 8. Nucleo-68 board schematics - Connectors

VDD 5V_EXT

Morpho connectors

GND

GND

GNDGND

24681012

13579

11141316151817201922212423

25 2627 2829 3031 3233 3435 3637 38

CN7HEADER_2X19_M

24681012

13579

11141316151817201922212423

25 2627 2829 3031 3233 3435 3637 38

CN10HEADER_2X19_M

USB_NUSB_P

R1100K

GND

GND

VIN

3V3

3V35V

AVDDGND

USB_NUSB_P

STM32WB55 USB Connector

NRST

VBUS 1

DM 2

DP 3

ID 4

GND 5

Shield 6

MicroB

CN1

1050170001GND

BOOT0

VBAT

5V_USB_MCU

5V_USB_MCU

3V3

5V

VIN

AVDD

Arduino Shield Connectors

GND

GND12345678

CN6

HEADER_1X8_F

12345678CN9

HEADER_1X8_F

123456

CN8

HEADER_1X6

12345678910

CN5

HEADER_1X10GND

3V3NRST

A5

A0A1A2A3A4

D0D1D2D3D4D5D6D7

D8D9

D10D11D12D13

D14D15

AVDDGND

GNDGNDVIN

5V3V3NRSTIOREF

OSC_INOSC_OUT

PC14PC15

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_PSB2Open

SB4

Open

PA13PA14

SB14Close

SB16OpenPB6

SB15Close

SB18OpenPC11

PA10

SB1Close

SB3Open

SB8Close

PA9SB10Open

SB5Close

SB6OpenPB10

PB12

PB13

PB3

SB12Close

SB13Open

PB14

PB15SB9Close

SB11Close

PB4

PB5SB7Open

PB6SB17Close

PB7

PD0PD1

PB0PB1

PC4PC5

PB2PB11

134

5

6

2

U6USBLC6-2SC6

GND

5V_USB_MCU

SB41Close

SB42Open

5V_INT

R331KPE4

UM

2435H


UM

2435 Rev 2

17/48

Figure 9. Nucleo-68 board schematics - Power management

5 6

Power ManagementTitle:


Revision:


MB1355C 01-RC112-Jun-2017

[No Variations]

Date:-

Variant:

VIN

3V35V VDD

C234.7uF

C294.7uF

VDD

VDD_MCU

VDD_MCU

VDD_MCU

VDD_MCU

C20

100nF

C17

100nF

C19

100nF

C18

100nF

C28100nF

C31100nF

C32100nF

GND

GND

GND

GND

GND

GND

GND GND GNDGND

GND

SB31Open

0805

GNDGND

GNDGNDGND

GNDGND GND

SB32 Close

VBAT

VDD_MCU

SB26Close

SB29Open

Open when SMPS=ONClose when SMPS=OFF

Close when VBATconnected 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

2468

1357

JP1

HEADER_2X4

SB25 Open

Supp

lySo

urce

s

(Warning:

1 2JP2

HEADER_1X2

1 2JP3

HEADER_1X2

3V3 LDO dedicated to ST_Link

FW configuration needed)

MCU Supply domain

SMPS domain

Commun Supply Parts

VDD

SB34Close

SB33Open3V3

VBATSB30Open

SB35Close

12Not Fitted

CN4HEADER_1X2

GND

SB27OpenSB28Open

SB24Open

12

CN11

12

CN12GND GND

GND

GND

C24100nF

GND

C8100nF/25V

GND

C12100nF

GNDC14

100nF

GND

C16100nFC15

1uF/X5R

R101K C13

1uF/

X5R

C21

1uF/

X5R C22

1uF/

X5R

C25100nF

C26100nF

C27100nF

GND

GND GND GND

GNDGND

L2FCM1608KF-601T03

R1110K

R121K

LED4LED RED

LED5

LED

RED

Vin3 Vout 2

Gnd

1

U2 LD1117S50TR

46

2

GND

1

3

PG

ENVIN VOUT

7

U3LD39050PU33R

GND

ArduinoMorpho

Ground for Probing

5V_USB_STLINK

+ 1-2

SocketCR2032

SK_BT1CR2032-SCK1B

CR2032BT1

CR2032-BAT1

JP1(7-8)

JMP1

Jumper 2.54mmJP2(1-2)

JMP2

Jumper 2.54mm

JP3(1-2)

JMP3

Jumper 2.54mm

51

2

GND

3

4

BYPASS

INHVIN VOUT

U5 LD3985M33R

C10

10uF

/25V

C11

4.7uF/10V

C910uF/25V

AVDD SB49OpenSB50CloseSB51Open

VDD

VDD_MCU

VDDSMPS44

VSSSMPS42

VLXSMPS43

VFBSMPS41

VDDSMPS

VSSSMPS

VLXSMPS

VFBSMPS

U1B

STM32WBxx_QFN68 VREF+13

VDDA14

VDD30

VDD45

VDDUSB55

VBAT1

VDD68

VSS

(ExP

AD

)69

U1D

STM32WBxx_QFN68

12

JP6 JP6(1-2)

JMP12

Jumper 2.54mm

5V_INT

L110uH

TAB1TAB_CR2032

GND 2

IN5

EN4

OUT 1

FAULT3

U4

STMPS2141STR

GND

Hardw


M2435

18/48U

M2435 R

ev 2

Figure 10. Nucleo-68 board schematics - ST-Link/V2-1

6 6

ST-Link/V2-1Title:


Revision:


MB1355C 01-RC112-Jun-2017

[No Variations]

Date:-

Variant:

US

BS

TLK

_N

T_S

WC

LK

T_SWDIO

T_N

RS

T

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

US

B_R

EN

UM

n

3V3_STLINK

3V3_STLINK

3V3_STLINK

3V3_STLINK

3V3_STLINK

3V3_STLINK

3V3_STLINK

3V3_STLINK

3V3_STLINK

A11

A23

A34

A45

A56

A67

A78

A89

OE10

GN

D11

B8 12B7 13B6 14B5 15B4 16B3 17B2 18

VC

CB

19

VC

CA

2

B1 20

U7TXS0108EPW VBUS

1

DM2

DP3

ID4

GND5

Shield6

MicroB

CN15

1050170001

R23

100K

GNDGND

GND

R1610KR17

100R2036K

5V_USB_STLINK

2

GN

D3

4

Vcc

5

U1074LVC1G07

NR

STR18

10K

Not Fitted

R22

10K

GND

GND

R24100K

R28

4K7GND

R26

4K7

Not FittedR30

GND

R29

100

R211K5

T_SWDIO

GND

T_SWCLK

GND

GND

GND GND

GND GND GND GND

GND

GND

GND

GND

GND

GND

GNDGND

GND

GND

T_SWO

3V3_STLINK

PB6

PB7

STLK_TXSTLK_RX

3V3_STLINK

PA13

PA14

SWOSWCLKSWDIO

TX_STlink (VCP)RX_STlink (VCP)

T_SWO

PB3

STL

K_S

WC

LKS

TLK

_SW

DIO

STL

K_R

ST

SWD STM32F103

D2BAT60JFILM

5V

SB37

Open

R14

2K7

R15

4K7

GND

3V3_STLINK

3V3_STLINK

SB38

CloseSB39

Close

SB40

Open

T_SWDIOT_SWCLK

USART2of STM32F103

TXRX 1

2CN14

R19

100K

R25

100/2K7

R27

100/100

GND

3V3_STLINK

24681012

135791114

1316

15

JP5

GND

GNDVDD

STLK_SWDIO

T_SWCLK

T_VDD

SB36

Close

PW

R_E

XT

STLK_RST

134

5

6

2

U9

USBLC6-2SC6

GND

5V_USB_STLINK

123456

Not FittedCN13HEADER_1X6

SWDIOSWCLKSWO

NRST

VREF

GNDC42

100nF

C41

100nF

C43

100nF

C46100nF

C4420pF

C4520pF

C47100nF

C48100nF

C49100nF

C50100nF

VBAT1

PA7

17

PC132

PA12 33PC143

PB0

18

PC154JTMS/SWDIO 34

OSCIN5

PB1

19

OSCOUT6

VSS_2 35

NRST7

PB2/

BO

OT1

20

VSSA8

VDD_2 36

VDDA9

PB10

21

PA010

JTC

K/S

WC

LK37

PA111

PB11

22

PA212

PA15

/JTD

I38

PA3

13

VSS

_123

PA4

14

PB3/

JTD

O39

PA5

15

VD

D_1

24

PA6

16

PB4/

JNTR

ST40

PB12 25

PB5

41

PB13 26

PB6

42

PB14 27

PB7

43

PB15 28

BO

OT0

44

PA8 29

PB8

45

PA9 30

PB9

46

PA10 31

VSS

_347

PA11 32

VD

D_3

48

U8STM32F103CBT6

PWR_ENn

T_VDD

3V3_STLINK

R32100K

R31

10

JMP5 Jumper 2.54mmJMP6 Jumper 2.54mmJMP7 Jumper 2.54mmJMP8 Jumper 2.54mmJMP9 Jumper 2.54mmJMP10 Jumper 2.54mmJMP11 Jumper 2.54mm

JP5(3-4 to 15-16)

Q12N2222

US

BS

TLK

_P

GND

T_VDD

NRST

X3

X3225-8MHz

UM2435 Rev 2 19/48


47

7.2 USB dongleThe 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


20/48 UM2435 Rev 2

Figure 12. USB dongle board (top view)

Figure 13. USB dongle board (bottom view)

UM2435 Rev 2 21/48


47

Figure 14. USB dongle mechanical drawing

UM

2435H


UM

2435 Rev 2

22/48

Figure 15. USB dongle schematics

2 2

STM32WB55CG USB Dongle SchematicTitle:


Revision:

Project: NUCLEO-WB55.USBDongle

MB1293C 01-RC126-Mar-2018

[No Variations]

Date:-

Variant:

PA09

PA110

PA211

PA312

PA413

PA514

PA615

PA716

PA817

PA918

PB2 19

PB8 5

PB9 6

PA1036

PA1137

PA1238

PA13-SWDIO39

PA14-SWCLK41

PA1542

PB3-SWO 43

PB4 44

PB5 45

PB6 46

PB7 47

PB0 28

PB1 29

PE4 30

U1E

STM32WBxx_QFN48

VBUS 1

D - 2

D+ 3

GND 4

CN3

USB_1

GND

5V_USB

GND

PA9

NRST

PB2PA5PA6

PB6PA3PA2PA0PB9PB8

3V3

GND

PA0

12345678910

Not Fitted

CN1

HEADER_1X10

123456789

10

Not Fitted

CN2

HEADER_1X10

PA13PA14

PB3

SWDIOSWCLK

PA13PA14

PB3

PA7 PA1

PA8

PB7

PA1PA2PA3PA4PA5PA6PA7PA8PA9

PB0PB1PB2

PB6PB7PB8PB9

SWDIOSWCLK

SWO

NRST

SPI1_NSSSPI1_SCK

SPI1_MISOSPI1_MOSI

I2C1_SDAWKUPLPUART1_TX

I2C1_SCL

LPUART1_RX

GPIOGND

ADC

GPIOGPIO

GND

GND

Dongle USB : Vout (3V3)Module : Vin (1V8 to 3V6)

134

5

6

2

U2USBLC6-2SC6

GND

5V_USB

USB_NUSB_P

Debug : Vref for STLink

SB2Close

SB6 Open

PA10

OSC_IN25

OSC_OUT24

PC14-OSC32_IN2

PC15-OSC32_OUT3

PH3-BOOT0 4

AT0 26

AT1 27

NRST 7U1C

STM32WBxx_QFN48

R1

100K

D4 BAT54KFILM

GND

NRST

3V3

C12100nF

GND

C1810pF

GND

C1710pF

X2

NX2012_32K768Hz

X1

NX2016_32MHz

GNDR2

10K

SB3Open

3V3

BOOT0

GND

PB0PB1

AT0AT1AT2AT3

1234

CN4

VDDSMPS34

VSSSMPS32

VLXSMPS33

VFBSMPS31

VDDSMPS

VSSSMPS

VLXSMPS

VFBSMPS

U1B

STM32WBxx_QFN48

3V3

GND

GND

GNDSB1

Open

C94.7uF

C104.7uF

L210uH

VDDA/VREF+8

VDD/VDDT20

VDD35

VDDUSB40

VBAT1

VDD48

VSS

(ExP

AD

)49

U1D

STM32WBxx_QFN48

GND

3V3

3V3

3V3

3V3

GND

GND

GND

GND

GND

GNDC15

100nF

C16100nF

C19

100nF

C20

100nF

C21100nF

C22100nF

L3

FCM1608KF-601T03

SB5Close

3V3

RF0 22

RF1 21VDDRF23

U1A

STM32WBxx_QFN48

GND

GND

3V3

GND GND

ANT

Antenna Matching Network

ANT

Mean

derA

ntenn

a2.4

GHz

(seeA

N335

9onw

ww.st

.com)

PCB Antenna

GND

CN5UFL

GND

C1

100nFC2

100pF

C4

10nF C6NF

C8

NF

GND GND

Antenna Matching Network (connected to UFL)

C28NF

C29NF

L4 0R

1 3

2

FLT1LFB182G45CGFD436

GND

L6 0R

C300.8pF

GND

Band Pass Filter

L6 0R

C300.8pF

GND

50 Ohms Matching Network (Compents values will be updated after evaluation)

GND

SC1

GND

SC2

GND

SC3

GND

SC4

Socket for Metallic Shield

C3NF

GNDMurata GRM1555C1H1R2WA01D

C71.2pF

Murata LQG15HS3N6S02L1

3.6nH

SH1

Shield 17.2x17.2x3

(Compents values will be updated after evaluation)

R31K

SW1User PB

R4680

D1LE

DB

LUE

R5680

D2

LED

GR

EEN

R6680

D3

LED

RED

GND GND GND GNDPA

4

PB0

PB1

3V3

SW2

MLL

1200

S_TE

BO

OT0

BOOT0 = "1"

BOOT0 = "0"

PA10

51

2

GND

3

4

BYPASS

INHVIN VOUT

U3LD3985M33R

3V3

5V_USB

C27100nF

C26

1uFC2510nF

C24

100nF

C23

1uF

GNDGND GND GND GND GND

SB4Close

(default position)

UM2435 Rev 2 23/48


47

7.3 Getting started

7.3.1 ConventionsTable 3 provides the definition of some conventions used in this document.

7.3.2 Quick startThe pack board is a low-cost and easy-to-use development kit to quickly evaluate and start a project based on an STM32WB microcontroller featuring a 2.4 GHz RF transceiver supporting Bluetooth® specification v5.0 and IEEE 802.15.4-2011 PHY and MAC in a VFQFPN68 or UFQFPN48 package.1. Before installing and using the product, accept the Evaluation Product License

Agreement from www.st.com/stm32nucleo.2. For correct identification of all device interfaces from the host PC, install the Nucleo

USB driver available on www.st.com/ stm32nucleo before connecting the board.3. Set correctly the jumper JP1 ([7-8] on USB STL).4. Plug the Nucleo USB ST-LINK connector (P2P server) and USB dongle (P2P client) to

power sources. On the P2P server, you will see a blinking LED for approximately 1 minute.

5. Once the P2P client is powered, push the SW1 button to start scanning (it will automatically connect to the P2P server).

6. Once connected, the green LED blinks for each connection interval. The P2P client searches for the P2P service, LEDs and buttons characteristics, and enables notification.

7. Pushing the SW1 button toggles the blue LED on the remote device.8. Pushing the SW2 button on the Nucleo Board changes the connection interval (50 ms,

1 s). The effect is visible directly on the green LED of the Nucleo board.9. The demonstration software and several software examples that make it possible to

use the STM32 Nucleo and USB dongle features are available at www.st.com/ stm32nucleo.

10. Develop your own application using the available examples.

7.3.3 Default boards configurationBy default the board is set in SMPS mode. It is possible to set the board In LDO mode, see Section 7.13: Jumper configuration.

Table 3. Jumper and SB ON/OFF conventionsConvention Definition

Jumper JPx ON Jumper fitted

Jumper JPx OFF Jumper not fitted

Jumper JPx [1-2] Jumper to be fitted between Pin 1 and Pin 2

Solder bridge SBx ON SBx connections closed by a 0 Ω resistor

Solder bridge SBx OFF SBx connections left open


24/48 UM2435 Rev 2

Moreover, the board embeds a level shifter, which allows the user to debug the firmware even if the target (STM32WB55) is supplied by a low-level voltage (1.8 to 3.3 V). There is no jumper on the USB dongle.

The default jumper configuration and the VDD = 1.8 V setting is done according to Table 3.

Table 4. Default jumper configurationJumper Definition Default position Comment

JP1 Power selection ON [7-8] 5 V from ST-LINK

JP2 IDD measurement ON VDD current measurement

JP3 IDD measurement ON MCU VDD current measurement

JP4 RF power ON Possibility of isolating RF power

JP5 Level shifter All ON, except [1-2] that is OFF Level shifter

JP6 VDD_IN_SMPS ON VDD SMPS

UM2435 Rev 2 25/48


47

7.4 Embedded ST-LINK/V2-1The ST-LINK/V2-1 programming and debugging tool is integrated on the Nucleo board.

The new features supported on 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 on USB

The following features are no longer supported on ST-LINK/V2-1:• SWIM interface• Application voltage lower than 3 V (a level shifter is needed to support it)

For all general information concerning debugging and programming features common between V2 and V2-1 versions, refer to UM1075 “ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32”, available on www.st.com.

Nucleo-68 optional configuration for ST-LINK:• The Nucleo-68 board is divided in two parts: ST-Link part and target MCU part.

The PCB area dedicated to the first one can be cut to reduce board size. In this case the second part can only be powered by VIN, E5V and 3.3V on ST Morpho connectors, or VIN and 3.3V on Arduino™ connectors.

• It is still possible to use the ST-Link part to program the main MCU using wires between SWD connector and SWD signals available on ST Morpho connectors.

7.4.1 DriversBefore connecting the Nucleo board to a Windows® PC (XP, 7, 8 or 10) via USB, a driver for the ST-LINK/V2-1 (available on www.st.com) must be installed.

If the Nucleo board is connected to the PC before the driver is installed, some interfaces may be declared as “unknown” in the PC device manager. In this case the user must install the driver files, and update the driver of the connected device from the device manager.

Note: Use preferably the “USB Composite Device” handle for a full recovery.

Figure 16. USB composite device


26/48 UM2435 Rev 2

7.4.2 ST-LINK/V2-1 firmware upgradeThe ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the USB port. As the firmware may evolve during the life time of ST-LINK/V2-1 (for example new functionality, bug fixes, support for new microcontroller families), it is recommended to check for updates on www.st.com before starting to use the Nucleo-68 board.

Using the ST-LINK/V2-1 to program/debug and supply the on-board MCU

To program the on-board STM32WB55, plug in the jumper JP1[7-8] connector, as shown in Figure 17.

Figure 17. ST-LINK debugger: JP1 configuration for on-board MCU

UM2435 Rev 2 27/48


47

7.5 Power supply and selection

7.5.1 External power supply inputThe Nucleo-68 board is designed to be powered by several DC power supplies. It is possible to configure it to use any of the following power supplies by setting Jumper JP1:• 5V_ST_LINK from STLINK USB connector (this is the default configuration)• VIN (7 to 12 V) from Arduino™ connector or external connector CN4• 5V_EXT from ST-Morpho connector• 5V_USB from MCU USB (USB user)• CR032 battery

The power supply capabilities are summarized in Table 5.

5V_USB_STLINK is a DC power with limitation from ST-LINK USB connector (USB type microB connector of ST-LINK/V2-1).In the default setting JP1 needs to be on pin [7-8] to select 5V_USB_STLINK power source on silkscreen of JP1. If the USB enumeration succeeds, the 5V_ST_LINK power is enabled by asserting the PWR_ENn signal from STM32F103CBT6. This pin is connected to a power switch (STMPS2141STR), which powers the board. This power switch also features a current limitation to protect the PC in case of currents exceeding 750 mA.

The Nucleo board and the shield on it can be powered from ST-LINK USB connector CN15, but only ST-LINK circuit has the power before USB enumeration, because the host PC only provides 100 mA to the board at that time. During the USB enumeration, Nucleo board needs 500 mA from the host PC. If the host is able to provide the required power, the enumeration finishes by a “SetConfiguration” command and then, the power transistor STMPS2141STR is switched ON, the red LED (LED5) is turned ON, and the Nucleo board

Table 5. Power sources

Input name Connector Voltage range Maximum current Limitations

5V_USB_STLINK CN15

4.75 to 5.25 V 500 mA

Maximum current depends upon the USB wall charger used to power the Nucleo-68 board

5V_USB_USER CN1

Maximum current depends upon USB enumeration:– 100 mA without enumeration– 500 mA with enumeration

VIN CN6 Pin 8CN4 (SB24 on) 7 to 12 V 800 mA

From 7 to 12 V only Input current capability linked to input voltage:– 800 mA when Vin = 7 V– 450 mA when 7 V < Vin < 9 V– 300 mA when 9 V < Vin < 10 V– < 300 mA when Vin > 10 V

5V_EXT CN7 Pin 6 4.75 to 5.25 V 500 mA -

CR032 battery SK_BT1 - 230 mAh -


28/48 UM2435 Rev 2

and its shield can use up to 500 mA. If the host is unable to provide the requested current, the enumeration fails. Therefore the power switch STMPS2141STR remains OFF and the MCU is not powered. As a consequence LED5 remains turned OFF. In this case it is mandatory to use an external power supply.

In this configuration JP1[7-8] must be connected as in Figure 18.

Figure 18. JP1[7-8]: 5V_STL power source

VIN is the 7 to 12 V DC power from ARDUINO™ CN8 pin 8 named VIN on Arduino™ connector silkscreen, or from Morpho connector CN7-24, or from external connector CN4.

In this case JP1 has to be on pin [3-4] to select VIN power source on silkscreen of JP1. The DC power can come from the power supply through the Arduino™ UNO V3 battery shield (compatible with Adafruit® PowerBoost 500 Shield).

UM2435 Rev 2 29/48


47

In this configuration JP1[3-4] must be connected as shown in Figure 19.

Figure 19. JP1[3-4]: 5V_VIN power source

• The board can be also supplied by the USB User (5V_USB_MCU)• No debug is possible on this USB port


30/48 UM2435 Rev 2

In the 5V_USB_MCU configuration JP1 [5-6] must be connected as shown in Figure 20.

Figure 20. JP1[5-6]: 5V_USB_MCU power source

Caution: A solder bridge (SB25) can be used (not an ST recommended setting) to bypass the USB PWR protection STMPS2141STR. SB25 can be set only if the board is powered by USB PC and maximum current consumption on 5V_STLINK doesn’t exceed 100 mA (including an extension board or Arduino™ Shield). In such condition USB enumeration will always succeed since no more than 100 mA is requested to the PC. Possible configurations of SB25 are summarized in Table 6.

UM2435 Rev 2 31/48


47

Caution: If the maximum current consumption by the Nucleo and its extension boards exceeds 500 mA it is recommended to power the board using an external power supply connected to E5V or VIN.

7.5.2 External power supply output5V: when the Nucleo board is powered by USB, VIN or 5V_EXT, the 5V (CN6 pin 5 or CN7 pin 18) can be used as output power supply for an Arduino™ shield or an extension board. In this case, the maximum current specified in Table 5 needs to be respected.

3V3 on CN6 pin 4 or CN7 pin 16 can be used as power supply output. The current is limited by the maximum capability of the regulator U3 (LD39050PUR33 from STMicroelectronics), that is 500 mA for the Nucleo board and its shield.

7.5.3 Internal power supplyThe device allows the application to meet the tight peak current requirements imposed by the use of standard coin cell batteries. When the high efficiency embedded SMPS step-down converter is used, the RF front end consumption (Itmax) is reduced.

It is possible to be also in LDO mode by changing the firmware, SB31 needs to be closed.

7.6 Programing/debugging when the power supply is not from USB ST-LINK (5V_ST_link)VIN or 5V_EXT can be used as external power supply if the current consumption of Nucleo and extensions boards exceeds the allowed current on USB. In this condition it is still possible to use the USB for communication for programming or debugging only.

In this case it is mandatory to power the board first using VIN or 5V_EXT, then connecting the USB cable to the PC. The enumeration succeeds thanks to the external power source.

The following power sequence procedure must be respected:1. Configure jumper JP1 to select between VIN or 5V_EXT, see Section 7.3.12. Be sure that SB37 is removed3. Connect the external power source to VIN or E5V4. Power ON the external power supply 7 V < VIN < 12 V to VIN, or 5 V for 5V_EXT5. Check that the green LED is turned ON6. Connect the PC to USB connector CN15

Table 6. SB25 bypass USB PWR protectionDefault position Power sypply Allowed current

OFF (not soldered)USB PWR through CN15

500 mA max (limited by STMPS2141STR)

ON (soldered) 500 mA max

OFF (not soldered)VIN or E5V PWR

No limitation

ON (soldered) Forbidden configuration(1)

1. SB25 must be removed when the board is powered by 5V_EXT (CN7 pin 6) or by VIN (CN6 pin 8).


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If this sequence is not respected, the board may be powered by VBUS first from STLINK, with some risks:• If more than 500 mA are needed by the board, the PC may be damaged, or the current

can be limited by the PC: as a consequence the board will be not correctly powered.• 500 mA is requested by enumeration (since SB37 must be OFF), this request can be

rejected and enumeration won’t succeed, consequently the board will be not powered (LED5 remains OFF).

In some cases it can be interesting to use the 3V3 (CN6 pin 4 or CN7 pin 16) directly as power input, for instance when the 3.3 V is provided by an extension board. When Nucleo is powered by 3V3, the ST-LINK is not powered, thus programming and debug features are unavailable.

7.7 OSC clock sources• LSE: 32.768 kHz external oscillator, for accurate RTC and calibration with other

embedded RC oscillators• HSE: high quality 32 MHz external oscillator with trimming, needed by the RF

subsystem

7.7.1 LSE: OSC 32 kHz clock supplyThere are three ways to configure the pins corresponding to low-speed clock (LSE):1. LSE on-board oscillator X2 crystal (default configuration) 32.768 kHz, 7 pF, 20 ppm.

Refer to application note AN2867 “Oscillator design guide for STM8AF/AL/S and STM32 microcontrollers”, available on www.st.com. It is recommended to use NX2012SA manufactured by NDK.

2. Oscillator from external to PC14 input: from external oscillator through pin 25 of CN7 connector. The following configuration is needed:– SB45 and SB46 ON– X2, C6 and C7 removed

3. LSE not used: PC14 and PC15 are used as GPIOs instead of low speed clock. The following configuration is needed:– SB45 and SB46 ON– X2, C6 and C7 removed

7.7.2 OSC clock supplyThe HSE on board oscillator 32 MHz X1 crystal is provided for RF activities with tuning capacitors. Refer to STM32 microcontroller datasheets, and to AN2867 for oscillator design. It is recommended to use NX2016SA 32 MHz EXS00A-CS06654 manufactured by NDK. SB44 and SB43 must be open.

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7.8 Reset sourcesThe reset signal of Nucleo board is active low and the reset sources include:• Reset button SW4• Embedded ST-LINK/V2-1• Arduino™ UNO V3 connector from CN6 pin 3• ST-Morpho connector CN7 pin 14

7.9 Virtual COM port: LPUART/USARTLPUART or USART interface of STM32 Microcontroller on the Nucleo-68 board can be connected to STLINK/V2-1 MCU or on Shields on ST-Morpho connectors and Arduino™ UNO V3 connectors.

The LPUART/USART selection can be changed by setting related solder bridges.

Refer to Table 7 for the UART/LPUART connection to interfaces VCP or Arduino™ UART.

Table 7. LPUART1 and USART1 connectionsSB Features

SB15 ON SB18 OFF LPUART1 (PA2/PA3) connected to Arduino™ and Morpho connector

JP5[15-16] ON JP5[13-14] ON SB38 ON SB39 ON

USART1 (PB6/PB7) connected to STLINK VCP


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7.10 LEDsThree LEDs on the top side of the Nucleo board help the user during the application development.• LED6 COM: LED6 is a bi-color LED, whose default status is Red, turns to Green to

indicate that communication is in progress between the PC and the ST-LINK/V2-1, as follows:– Slow blinking red / OFF: at power-on, before USB initialization– Fast blinking red / OFF: after the first correct communication between PC and

ST-LINK/V2-1 (enumeration)– Red ON: when initialization between PC and ST-LINK/V2-1 is successfully

finished– Green ON: after successful target communication initialization– Blinking red / green: during communication with target– Green ON: communication finished and OK– Orange ON: communication failure

• LED4: 5V_USB: this red LED switches ON when over-current is detected (more than 500 mA is requested) on USB VBUS. In this case it is recommended to supply the board by E5V or VIN, or in USB_CHARGER mode.

• LED5: 5V_PWR: this red LED indicates that MCU part is powered and 5 V power is available.

Three user LEDs are also available, they are LED1, LED2 and LED3.

7.11 Push buttonsFour buttons are available on the Nucleo board.• SW1, SW2, SW3 USER: button for User and Wake-Up function is connected to the I/O

PC13 of the STM32 MCU. When the button is pressed the logic state is “1”, otherwise the logic state is “0”. Wake-Up is available on SW1, SB48 must be ON and SB47 OFF.

• SW4 RESET: button is connected to NRST, is used to RESET the STM32. When the button is pressed the logic state is “0”, otherwise the logic state is “1”.

7.12 Current measurementJumper JP2 allows the user to measure the power consumption, by removing the jumper and connecting an ammeter.

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47

7.13 Jumper configurationJumper default position are listed in Table 4. Table 8 summarizes the other settings and configurations.

Table 8. Configuration of jumpers and solder bridges

Supply source JP1(1-2)JP1(3-4)

JP1(5-6)

JP1(7-8) SB24 SB26 SB27 SB28 SB29

USB connector

STlink (default) Open Open Open Closed Open Closed Open Open Open

STM32WB55 (user USB) Open Open Closed Open Open Closed Open Open Open

5V from Morpho shield (5V_EXT) Closed Open Open Open Open Closed Open Open Open

5V from Arduino™ shield (5V) Open Open Open Open Open Closed Open Open Open

VIN from Arduino™ shield Open Closed Open Open Open Closed Open Open Open

External power supply on CN4

1.8 to 3.3 V Open Open Open Open Open Open Closed Open Open

5 to 7 V Open Open Open Open Open Closed Open Closed Open

7 to 12 V Open Closed Open Open Closed Closed Open Open Open

CR2032 battery Open Open Open Open Open Open Open Open Closed

Connectors UM2435

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8 Connectors

Eight connectors are implemented on the Nucleo board:• CN15: ST-LINK USB connector• CN5, CN6, CN8 and CN9 for Arduino™ Uno V3 connector• CN7 and CN10 for ST-Morpho connector• CN1: USB User connector.

8.1 USB ST-LINK micro-B connector CN15The USB connector CN15 is used to connect the embedded ST-LINK/V2-1 to the PC for programming and debugging the Nucleo microcontroller.

Figure 21. USB STLINK micro-B connector CN15 (front view)

The related pinout for USB STLINK connector is detailed in Table 9.

Table 9. USB STLINK micro-B pinout (connector CN15) Pin number Pin name Signal STM32 pin Function

1 VBUS 5V_STLINK / 5V_USB_CHG - 5 V power

2 DM (D-) STLINK_USB_D_N PA11 USB differential pair M

3 DP (D+) STLINK_USB_D_P PA11 USB differential pair M

4 ID - - -

5 GND - - GND

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UM2435 Connectors

47

8.2 Arduino™ Uno revision 3 connectorsThe Arduino™ connectors CN5, CN6 CN8 and CN9 are female connectors compatible with Arduino™ standard. Most shields designed for Arduino™ fit to the Nucleo board.

The Arduino™ connectors on the Nucleo board support the Arduino™ Uno revision 3.

Figure 22. Arduino™ connector

Connectors UM2435

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The related pinout for Arduino™ connector is detailed in Figure 23 and Table 10.

Figure 23. Arduino™ connector pinout

Table 10. Arduino™ connectors pinout Connector Pin number Pin name Signal STM32 pin Function

CN6

1 NC - - Reserved for test

2 IOREF - - IO reference

3 NRST NRST NRST RESET

4 3V3 - - 3V3 input/output

5 5V - - 5V output

6 GND - - GND

7 GND - - GND

8 VIN - - 7-12V power input

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UM2435 Connectors

47

CN8

1 A0 ADC PC0 ADC1_IN1


3 A2 ADC PA1 ADC1_IN5

4 A3 ADC PA0 ADC1_IN6



CN5

10 SCL/D15 ARD_D15 PB8 I2C1_SCL

9 SDA/D14 ARD_D14 PB9 I2C1_SDA

8 AVDD VREF+/VDDA - VREF+/VDDA

7 GND - - GND

6 SCK/D13 ARD_D13 PA5 SPI1_SCK

5 MISO/D12 ARD_D12 PA6 SPI1_MISO

4 PWM/MOSI/D11 ARD_D11 PA7 TIM1_CH1N/SPI1_MOSI

3 PWM/CS/D10 ARD_D10 PA4/PB10 TIM2_CH3 on PB10 /SPI_NSS on PA4

2 PWM/D9 ARD_D9 PA9 TIM17_CH1

1 D8 ARD_D8 PC12 IO

CN9

8 D7 ARD_D7 PC13 IO

7 D6 ARD_D6 PA8 TIM1_CH1


5 D4 ARD_D4 PC10 IO


3 D2 ARD_D2 PC6 IO

2 D1 ARD_D1 PA2 LPUART1_TX

1 D0 ARD_D0 PA3 LPUART1_RX

Table 10. Arduino™ connectors pinout (continued)Connector Pin number Pin name Signal STM32 pin Function

Connectors UM2435

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8.3 ST Morpho connectors CN7 and CN10The ST-Morpho connectors CN7 and CN10 are male pin headers accessible on both sides of the board. All signals and power pins of the MCU are available on Morpho connectors. These connectors can also be probed by an oscilloscope, logical analyzer or voltmeter.

Figure 24. ST-Morpho connector pinout

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UM2435 Connectors

47

8.4 Extension connectors CN1 and CN2 on USB dongleThe related pinout and the MCU assignment for the extension connectors are detailed in Figure 25.

Figure 25. Extension connectors pinout

CN2 CN1

Nucleo-68 and USB dongle MCU IO assignment UM2435

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Appendix A Nucleo-68 and USB dongle MCU IO assignment

Table 11. IO assignment Pin

numberPin name (function

after reset)

Nucleo-68 QFN68(MB1355C)

USB dongle QFN48(MB1293C)

UFQ

FPN

48

VQFP

N68

Arduino™ Morpho Debug OtherfunctionsExtension

connectors DebugOther

functions

- 2 PC13 D7 CN10-23 -

Push button 1

(SW1 alternate)

- - -

24 34 OSC_OUT - CN7-31 - - - - -

25 35 OSC_IN - CN7-29 - - - - -

2 3 PC14-OSC32_IN

- CN7-25 - - - - -

3 4 PC15-OSC32_OUT

- CN7-27 - - - - -

4 5 PH3-BOOT0 - CN7-7 - BOOT0 - - BOOT0

5 6 PB8D15 (I2C1_SCL,

DGPIO)CN10-3 - -

CN2-1 (I2C1_SCL)

- -

6 7 PB9D14

(I2C1_SDA, DGPIO)

CN10-5 - -CN2-2

(I2C1_SDA)- -

7 8 NRST - CN7-14 - - CN1-2 - -

9 15 PA0 A3 CN7-34 - -CN2-3

(WKUP1)- -

10 16 PA1 A2 CN7-32A - -CN2-10(ADC)

- -

11 17 PA2D1

(LPUART1_TX, DGPIO)

CN10-35A - -CN2-4

(LPUART1_TX)- -

12 18 PA3D0

(LPUART1_RX, DGPIO)

CN10-37 - -CN2-5

(LPUART1_RX)- -

13 19 PA4D10A

(SPI1_NSS)CN10-17A - - - - LED1

14 20 PA5D13

(SPI1_SCK)CN10-11 - -

CN1-8 (SPI1_SCK)

- -

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UM2435 Nucleo-68 and USB dongle MCU IO assignment

47

15 21 PA6D12

(SPI1_MISO)CN10-13 - -

CN1-9 (SPI1_MISO)

- -

16 22 PA7D11

(SPI1_MOSI, PWM)

CN10-15A - -CN1-10

(SPI1_MOSI)- -

17 23 PA8 D6 (PWM) CN10-25 - - CN2-8 (GPIO) - -

18 24 PA9 D9 (PWM)CN10-19

CN10-26B- - - - -

- 25 PC4 - CN10-1 -Push

button 1 (SW1)

- - -

- 26 PC5 - CN7-3 - - - - -

19 27 PB2 - CN7-2 - -CN1-7

(SPI1_NSS)- -

- 28 PB10 D10B (PWM) CN10-17B - - CN2-7 -Push

botton 1 (SW1)

- 29 PB11 - CN7-1 - - - - -

28 38 PB0 - CN10-22 -LED2

(GREEN)- - LED2

29 39 PB1 - CN10-24 -LED3 (RED)

- - LED3

30 40 PE4 - CN7-4 - - - - -

- 46 PB12 - CN10-16 - - - - -

- 47 PB13 - CN10-30A - - - - -

- 48 PB14 - CN10-28 - - - - -

- 49 PB15 - CN10-26A - - - - -

- 50 PC6 D2 CN10-33 - - - - -

- 51 PA10 D3 (PWM)CN10-31

CN10-15B- - - - -

37 52 PA11 - CN10-14 - USB_DM USB_DM - -

38 53 PA12 - CN10-12 - USB_DP USB_DP - -

39 54 PA13 - CN7-13 SWDIO - CN1-3 SWDIO -

Table 11. IO assignment (continued)Pin


after reset)



UFQ

FPN

48

VQFP

N68



functions

Nucleo-68 and USB dongle MCU IO assignment UM2435

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41 56 PA14 - CN7-15 SWCLK - CN1-4 SWCLK -

42 57 PA15 D5 (PWM) CN10-27 - - - - -

- 58 PC10 D4 CN10-29 - - - - -

- 59 PC11 - CN10-35B - - - - -

- 60 PC12 D8 CN10-21 - - - - -

- 61 PD0 - CN10-36 -Push

button 2 (SW2)

- - -

- 62 PD1 - CN10-38 -Push

button 3 (SW3)

- - -

43 63 PB3 - CN10-30B SWO - CN1-5 SWO -

44 64 PB4 - CN10-4 - - - - -

45 65 PB5 - CN10-26C -LED1

(BLUE) - - -

46 66 PB6 -CN10-34CN7-32B

STLK_RX CN2-6 (GPIO) - -

47 67 PB7 - CN10-6 STLK_TX CN2-7 (GPIO) - -

Table 11. IO assignment (continued)Pin


after reset)



UFQ

FPN

48

VQFP

N68



functions

UM2435 Rev 2 45/48

UM2435Federal Communications Commission (FCC) and Industry Canada (IC) compliance state-

47

9 Federal Communications Commission (FCC) and Industry Canada (IC) compliance statements

9.1 FCC compliance statementThis device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may

cause undesired operation.

Please take attention that changes or modification not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Note: This product has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This product generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this product does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected. • Consult the dealer or an experienced radio/TV technician for help.

This equipment complies with FCC/IC RSS-102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator and your body.

9.2 IC compliance statementThis device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: 1. this device may not cause interference, and2. this device must accept any interference, including interference that may cause

undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radioexempts de licence. L'exploitation est autorisée aux deux conditions suivantes :1. l'appareil ne doit pas produire de brouillage, et2. l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le

brouillage est susceptible d'en compromettre le fonctionnement.

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain

Federal Communications Commission (FCC) and Industry Canada (IC) compliance statements

46/48 UM2435 Rev 2

should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.

This equipment complies with FCC/IC RSS-102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator & your body.

Ce matériel est conforme aux limites de dose d'exposition aux rayonnements, FCC / CNR-102 énoncée dans un autre environnement.cette equipment devrait être installé et exploité avec distance minimale de 20 cm entre le radiateur et votre corps.

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UM2435 Revision history

47

10 Revision history

Table 12. Document revision historyDate Revision Changes

28-Sep-2018 1 Initial release.

01-Apr-2019 2Added.Section 9: Federal Communications Commission (FCC) and Industry Canada (IC) compliance statements and its subsections.Minor text edits across the whole document.

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IMPORTANT NOTICE – PLEASE READ CAREFULLY

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.

No license, express or implied, to any intellectual property right is granted by ST herein.

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.

ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.

Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2019 STMicroelectronics – All rights reserved

1 FeaturesFigure 1. Nucleo-68 and USB dongle boards (top view on the left, bottom view on the right)

2 Product marking3 System requirements4 Development toolchains5 Demonstration software6 Ordering informationTable 1. Ordering informationTable 2. Example of codification

7 Hardware layout and configuration7.1 Nucleo-68 boardFigure 2. Nucleo-68 hardware block diagramFigure 3. Nucleo-68 board (top view)Figure 4. Nucleo-68 board (bottom view)Figure 5. Nucleo-68 board mechanical drawingFigure 6. Nucleo-68 board schematicsFigure 7. Nucleo-68 board schematics - RF partFigure 8. Nucleo-68 board schematics - ConnectorsFigure 9. Nucleo-68 board schematics - Power managementFigure 10. Nucleo-68 board schematics - ST-Link/V2-1

7.2 USB dongleFigure 11. USB dongle hardware block diagramFigure 12. USB dongle board (top view)Figure 13. USB dongle board (bottom view)Figure 14. USB dongle mechanical drawingFigure 15. USB dongle schematics

7.3 Getting started7.3.1 ConventionsTable 3. Jumper and SB ON/OFF conventions

7.3.2 Quick start7.3.3 Default boards configurationTable 4. Default jumper configuration

7.4 Embedded ST-LINK/V2-17.4.1 DriversFigure 16. USB composite device

7.4.2 ST-LINK/V2-1 firmware upgradeFigure 17. ST-LINK debugger: JP1 configuration for on-board MCU

7.5 Power supply and selection7.5.1 External power supply inputTable 5. Power sourcesFigure 18. JP1[7-8]: 5V_STL power sourceFigure 19. JP1[3-4]: 5V_VIN power sourceFigure 20. JP1[5-6]: 5V_USB_MCU power sourceTable 6. SB25 bypass USB PWR protection

7.5.2 External power supply output7.5.3 Internal power supply

7.6 Programing/debugging when the power supply is not from USB ST-LINK (5V_ST_link)7.7 OSC clock sources7.7.1 LSE: OSC 32 kHz clock supply7.7.2 OSC clock supply

7.8 Reset sources7.9 Virtual COM port: LPUART/USARTTable 7. LPUART1 and USART1 connections

7.10 LEDs7.11 Push buttons7.12 Current measurement7.13 Jumper configurationTable 8. Configuration of jumpers and solder bridges

8 Connectors8.1 USB ST-LINK micro-B connector CN15Figure 21. USB STLINK micro-B connector CN15 (front view)Table 9. USB STLINK micro-B pinout (connector CN15)

8.2 Arduino™ Uno revision 3 connectorsFigure 22. Arduino™ connectorFigure 23. Arduino™ connector pinoutTable 10. Arduino™ connectors pinout

8.3 ST Morpho connectors CN7 and CN10Figure 24. ST-Morpho connector pinout

8.4 Extension connectors CN1 and CN2 on USB dongleFigure 25. Extension connectors pinout

Appendix A Nucleo-68 and USB dongle MCU IO assignmentTable 11. IO assignment

9 Federal Communications Commission (FCC) and Industry Canada (IC) compliance statements9.1 FCC compliance statement9.2 IC compliance statement

10 Revision historyTable 12. Document revision history

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