ST X-NUCLEO-BNRG2A1 Bedienungsanleitung

Introduction

The X-NUCLEO-BNRG2A1 expansion board provides Bluetooth low energy connectivity for developer applications and can be

plugged onto an STM32 Nucleo development board (e.g., NUCLEO-L476RG with ultra-low power STM32 microcontroller)

through its Arduino UNO R3 connectors.

The expansion board features the Bluetooth® v5.0 compliant and FCC certified BlueNRG-M2SP application processor module

based on the ST BlueNRG-2 System-on-Chip. This SoC manages the complete Bluetooth low energy stack and protocols on its

Cortex-M0 core and programmable Flash, which can accommodate custom applications developed using the SDK. The

BlueNRG-M2SP module supports master and slave modes, increased transfer rates with data length extension (DLE), and

AES-128 security encryption.

The X-NUCLEO-BNRG2A1 interfaces with the STM32 Nucleo microcontroller via SPI connections and GPIO pins, some of

which can be configured by the hardware.

Figure 1. X-NUCLEO-BNRG2A1 expansion board

Getting started with the X-NUCLEO-BNRG2A1 BLE expansion board based on

BLUENRG-M2SP module for STM32 Nucleo

UM2667

User manual

UM2667 - Rev 1 - December 2019

For further information contact your local STMicroelectronics sales office.

www.st.com

1Typical applications

The X-NUCLEO-BNRG2A1 expansion board can be used for the evaluation of the BlueNRG-M2 device in many

applications, such as:

•point-to-point communication

• sensor application

• home automation and lighting

• direct test mode (DTM)

UM2667

Typical applications

UM2667 - Rev 1 page 2/22

2Acronyms and abbreviations

Table 1. List of acronyms

Acronym Description

EEPROM Electrically erasable programmable read only memory

GHz Giga Hertz

GUI Graphical user interface

LED Light emitting diode

MCU Microcontroller unit

P2P Point-to-point communication

RF Radio frequency communication

SPI Serial peripheral interface

SWD Serial wire debug

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Acronyms and abbreviations

UM2667 - Rev 1 page 3/22

3Getting started

3.1 Overview

The X-NUCLEO-BNRG2A1 expansion board main features are:

•Based on the BlueNRG-M2SP module FCC certified module (FCC ID: S9NBNRGM2SP and IC: B976C-

BNRGM2SP)

• Compatible with STM32 Nucleo boards

• Equipped with Arduino UNO R3 connector

• Scalable solution, capable of cascading multiple boards for larger systems

• Free comprehensive development firmware library and examples for BlueNRG-2 compatible with

STM32Cube

•BlueNRG-M2SP:

– Bluetooth v5.0 compliant

– Supports master and slave modes

– BLE data packet length extension

– Embedded BALF-NRG-02D3 integrated matched balun with harmonic filter

• Interfaces:

– 1 UART, 1 I²C, 1 SPI, 14 GPIOs, 2 multifunction timers, 10-bit ADC, Watchdog & RTC, DMA controller,

PDM stream processor, SWD debug interface

• Small form factor: 11.5mmx13.5mm

• Complemented with Bluetooth low energy protocol stack library (GAP, GATT, SM, L2CAP, LL)

• AES security co-processor

• Bluetooth low energy SDK with a wide range of profiles

• Embedded BlueNRG-2 BLE SoC:

– High performance, ultra-low power Cortex-M0 32-bit based core

– Programmable embedded 256 KB Flash

– 24 KB embedded RAM with data retention

– Up to +8 dBm available output power

– Down to -88 dBm Rx sensitivity

– Up to 96 dB link budget with excellent link reliability

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Getting started

UM2667 - Rev 1 page 4/22

3.2 Hardware and software requirements

To use STM32 Nucleo development boards with the X-NUCLEO-BNRG2A1 expansion board, connect the boards

as shown below.

Figure 2. X-NUCLEO-BNRG2A1 expansion board connected to an STM32 Nucleo development board

The X-NUCLEO-BNRG2A1 can be connected to any STM32 Nucleo development board.

The following software and hardware specifications are required:

• a PC/laptop with Microsoft Windows (7 and above) to install the software package (X-CUBE-BLE2).

• DTM project to be flashed in the module

• a type A USB to mini-B USB cable to connect the STM32 Nucleo to the PC/laptop

• a 5-pin connector programming wire to program the X-NUCLEO-BNRG2A1 using the STM32 Nucleo

3.3 Board setup

Step 1. Check that the jumper on J10 connector is connected to provide the required voltage to the board

devices.

Step 2. Connect the X-NUCLEO-BNRG2A1 to the STM32 Nucleo board as shown in Figure 2.

Step 3. Connect jumper J14 to select the SPI clock for the SPI.

Step 4. Program the STM32 Nucleo with the corresponding firmware to use the X-NUCLEO-BNRG2A1 as a

network coprocessor.

The evaluation kit is ready-to-use.

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Hardware and software requirements

UM2667 - Rev 1 page 5/22

4Hardware description and configuration

4.1 Interconnection details

The X-NUCLEO-BNRG2A1 expansion board and the NUCLEO-L476RG development board connection details

are listed in the table below.

Table 2. X-NUCLEO-BNRG2A1 and NUCLEO-L476RG connection details (left connector)

Signal name

NC IOREF RESET +3V3 +5 V GND GNDS VIN A0 A1 A2 A3 A4 A5

Connector name

CN6 Power CN8 Analog

Pin number

12 3 45678123456

NUCLEO-L476RG MCU port

PA0 PA1 PA4 PB0 PC1 PC0

X-NUCLEO-BNRG2A1 expansion board signals

NC IOREF RESET +3V3 +5 V GND GND VIN DIO7/

BOOT

DIO1/

SPI_CS - - - -

Table 3. X-NUCLEO-BNRG2A1 and NUCLEO-L476RG connection details (right connector)

Signal name

D15 D14 - - D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Connector name

CN5 Digital CN9 Digital

Pin number

10 9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1

NUCLEO-L476RG MCU port

PB8 PB9 AVDD GND PA5 PA6 PA7 PB6 PC7 PA9 PA8 PB10 PB4 PB5 PB3 PA10 PA2 PA3

X-NUCLEO-BNRG2A1 expansion board signals

- - AREF GND

DIO0/

SPI_C

DIO2 DIO3 - - DIO4 - DIO6 DIO12 DIO14

DIO

SPI_

CLK

DIO5

DIO

11/

SPI_

DIO8

Note: To use PA1 as SPI_CS with DIO1 mount resistor R70.

To use PA1 as SPI_CS with DIO11 mount resistor R76.

To use PA2 as SPI_CS with DIO11 mount resistor R86.

To take control of RESET in the STM32 application with PA8, mount resistor R117.

4.2 SPI and GPIO connection options

The SPI and GPIO connection options between the STM32 Nucleo and BlueNRG-M2 on the X-NUCLEO-

BNRG2A1 expansion board can be used to enable different configurations in case a signal conflict occurs when

using other expansion boards.

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Hardware description and configuration

UM2667 - Rev 1 page 6/22

Table 4. X-NUCLEO-BNRG2A1 interface with STM32 Nucleo development board

X-NUCLEO-BNRG2A1 BlueNRG-M2SP Default STM32 port Optional STM32 port

PA0_SPI_IRQ_PB14

_BNRG1BOOT DIO7/BOOT PA0 PB14

To use the optional port, mount R82 and unmount R85

DIO1_SPI_CS DIO1 PA1 -

DIO11_SPI_CS DIO11 PA1 PA2

To use the optional port, mount R86 and unmount R76

SPI_CLK DIO0 PA5

JP14: pins 1-2 shorted

PB3

To use the optional port, short J14 pins 2 and 3

Table 5. X-NUCLEO-BNRG2A1 jumpers

Jumper Signals Description

J10 3.3 V Power connector

J11 User application

J12 SWD For SWD debugging/programming

J13 User application

J14 SPI_CLK To select the SPI clock pin PA5 or PB3

Default: pins 1-2 shorted

J15 PA0_SPI_IRQ

_PB14_BNRG1BOOT

This jumper is connected to DIO7 of the BlueNRG-2 and must be shorted for boot pin high.

DIO7 can be used for Bootloader activation.

4.3 Current measurement

To monitor the X-NUCLEO-BNRG2A1 expansion board power consumption, insert an ammeter probe between

pin 1 and 2 of the jumper J10 connector.

4.4 X-NUCLEO-BNRG2A1 component placement details

The figure below shows the component placement on the X-NUCLEO-BNRG2A1 expansion board.

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Current measurement

UM2667 - Rev 1 page 7/22

Figure 3. X-NUCLEO-BNRG2A1 on-board device placement

1. ST morpho connector (not mounted by default)

2. Arduino UNO R3 connector

3. Arduino UNO R3 connector

4. BlueNRG-M2SP

5. J15 - boot pin jumper

6. J14 - SPI_CLK select jumper

7. ST morpho connector (not mounted by default)

8. Arduino UNO R3 connector

9. Arduino UNO R3 connector

10. J10 - power jumper

11. J11 - user application jumper

12. J12 - SWD jumper

13. J11 - user application jumper

UM2667

X-NUCLEO-BNRG2A1 component placement details

UM2667 - Rev 1 page 8/22

5X-NUCLEO-BNRG2A1 on-board device description

5.1 BlueNRG-M2SP module

The BlueNRG-M2SP is a Bluetooth® low Energy System-on-Chip application processor certified module (FCC ID:

S9NBNRGM2SP

, IC ID: 8976C-BNRGM2SP), compliant with BT specifications v5.0 and BQE qualified. The

module supports multiple roles simultaneously and can simultaneously act as a Bluetooth Smart master and slave

device.

The BlueNRG-M2SP is based on BlueNRG-2 System-on-Chip and includes Bluetooth Low Energy stack and

protocols.

The device interfaces with STM32 Nucleo boards through SPI and GPIOs.

Table 6. BlueNRG-M2SP device details

Description Features

BlueNRG-M2SP Order code

SMD 23 pin Package

1.7- 3.6 V Operating Voltage

5.2 SPI EEPROM

The M95640-RMC6TG 64 Kbit serial SPI bus EEPROM with high-speed clock interface can be mounted on the X-

NUCLEO-BNRG2A1 expansion board.

It can be used to store the configuration parameters related to application or settings of the BlueNRG-2 RF

device.

Its main features are:

•Compatible with the Serial Peripheral Interface (SPI) bus

• Memory array – 64 Kb (8 Kbytes) of EEPROM – Page size: 32 bytes

• Write (byte write within 5 ms, page write within 5 ms)

• Additional Write lockable page (identification page)

• Write Protect: quarter, half or whole memory array

• High-speed clock: 20 MHz

Table 7. M95640-RMC6TG connection with NUCLEO-L476RG development board

M95640-RMC6TG EEPROM NUCLEO-L476RG Pin no. Connector name Signal name

D (PA7_SPI_MOSI) PA7 4 CN5 D11

Q(PA6_SPI_MISO) PA6 5 CN5 D12

C(SPI_CLK) PB3/PA5 4/6 CN9/CN5 D3/D13

/S(PB6_SPI_CSN) PB6 3 CN5 D10

Note: The SPI EEPROM IC is not mounted on the board.

To use PB3 or PA5 with C(SPI_CLK), select jumper J14.

To use PB6 as SPI_CSN, mount resistor R77.

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X-NUCLEO-BNRG2A1 on-board device description

UM2667 - Rev 1 page 9/22

Table 8. M95640-RMC6TG device details

Description Features

M95640-RMC6TG Order code

MLP8 Package

1.8 to 5.5 V Operating voltage

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SPI EEPROM

UM2667 - Rev 1 page 10/22

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