ST Microelectronics BNRGM2SA Users Manual

Preliminary Datasheet

Features

BlueNRG-M2SA

Very low power BlueNRG module for Bluetooth® Low Energy v5.0

• Bluetooth v5.0 compliant – Supports master and slave modes

– Multiple roles supported simultaneously

• Based on 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

• Interfaces:

• Bluetooth radio performance: – Max Tx power: + 8 dBm

– Excellent link reliability – Embedding BALF-NRG-02D3 integrated

matched balun with harmonic filter

• On-board chip antenna

• 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 wide range of profile available

• Certifications: – EU (RED) Type certificate

– FCC, IC modular approval certification – BT SIG End Product QDID

1 x UART, 1 x I2C, 1xSPI, 14 x GPIO, 2 x multifunction timer, 10-bit ADC, Watchdog & RTC, DMA controller, PDM stream processor, SWD debug Interface

• Pre-programmed UART bootloader

• Operating supply voltage: from 1.7 to 3.6 V

• Operating temperature range: -40 °C to 85 °C

Applications

• Internet of Things

• Smart Home

• Building and Industrial Automation

• Smart Lighting

• Remote and access control

• Fitness, wellness and sports

• Consumer medical

• Security and proximity

• Assisted living

• PC and smart phone peripherals

Description

The BLUENRG-M2SA is a Bluetooth® low Energy System-on-Chip application processor certified module, compliant with BT specifications v5.0 and BQE qualified. The BLUENRG-M2SA module supports multiple roles simultaneously and can act at the same time as Bluetooth Smart master and slave device.

The BLUENRG-M2SA is based on BlueNRG-2 system-on-chip and entire Bluetooth Low Energy stack and protocols are embedded into module.

The BLUENRG-M2SA module provides a complete RF platform in a tiny form factor. Radio, embedded antenna and high frequency oscillators are integrated to offer a certified solution to optimize the time to market of the final applications.

The BLUENRG-M2SA can be powered directly with a pair of AAA batteries or any power source from 1.7 to 3.6 V.

BlueNRG-M2SA

Contents

General description ................................................................................... 4

Block diagram ............................................................................................ 5

Software Development .............................................................................. 6

3.1 Software development Kit ............................................................................. 6

3.2 Software Architecture ................................................................................... 7

Hardware specifications ........................................................................... 8

4.1 Absolute maximum ratings ........................................................................... 8

4.2 Recommended operating conditions ............................................................ 8

4.3 Radio Features ............................................................................................. 8

4.4 Current consumption .................................................................................... 9

Reported values have been taken configuring the tool as shown in the Figure 4. ... 9

4.5 Pin assignment ........................................................................................... 11

4.6 Mechanical dimensions .............................................................................. 13

Hardware design ......................................................................................14

5.1 Reset Circuitry ............................................................................................ 14

5.2 Debug Interface .......................................................................................... 14

5.3 Reflow soldering ......................................................................................... 15

Regulatory compliance ............................................................................17

6.1 FCC certification ......................................................................................... 17

6.1.1 Labeling instructions .............................................................................................. 17

6.1.2 Product manual instructions .................................................................................. 18

6.2 IC certification ............................................................................................ 19

6.2.1 Labeling instructions .............................................................................................. 19

6.2.2 Product manual instructions .................................................................................. 20

6.3 EU Type approval for BLUENRG-M2SA module ........................................ 21

6.4 Bluetooth certification ................................................................................. 21

Ordering information ................................................................................29

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BlueNRG-M2SA

ECOPACK® ................................................................................................30

Traceability ...............................................................................................30

Revision history .......................................................................................31

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BlueNRG-M2SA

1 General description

The BLUENRG-M2SA is a Bluetooth Smart application processor module compliant with Bluetooth® specifications v5.0 with embedded ceramic antenna.

The BLUENRG-M2SA module has been designed around the ST BlueNRG-2 SoC where its Cortex-M0 core can execute both Bluetooth protocols and customer application. A complete power-optimized Bluetooth stack library provides:

• Master, slave, multiple roles support

• GAP: central, peripheral, observer or broadcaster roles

• simultaneous advertising and scanning

• capability of being slave of up to two masters simultaneously

• ATT/GATT: client and server

• SM: privacy, authentication and authorization

• L2CAP

• Link Layer: AES-128 encryption and decryption The BLUENRG-M2SA has 160KB embedded Flash and 24KB embedded RAM memory.

In the module are available 32MHz and 32KHz crystal oscillators. It has been designed to leverage the BlueNRG-2 integrated DC-DC step down converter in order to achieve best power consumption in active mode.

It can be configured to support both application processor (host-less) and network processor (hosted) modes.

Being based on the BlueNRG-2 SoC, the BLUENRG-M2SA module leverages all the tools and documentation of its ecosystem: Development Kit, Application Notes, User Manuals, Design Notes & Tips. A wide set of sample programs are also available in C source code.

The BLUENRG-M2SA module has a wide set of peripherals available for customer application (1 x UART interface, 1 x SPI interface, 1 x I2C interface, 14 GPIO, 2 x multifunction timer, 10-bit ADC, Watchdog & RTC, DMA controller, PDM stream processor).

The BLUENRG-M2SA module enables wireless connectivity into electronic devices, not requiring any RF experience or expertise for integration into the final product. The BLUENRG-M2SA module provides a complete RF application platform in a tiny form factor (11.5 x 13.5 x 2.0 mm) and being a certified solution optimizes the time to market of the final applications.

The BLUENRG-M2SA module allows applications to meet the tight advisable peak current requirements imposed with the use of standard coin cell batteries. Optimized results are obtained with the embedded high-efficiency DC-DC step-down. BLUENRG-M2SA can be powered directly with a standard 3 V coin cell battery as with a pair of AAA batteries or any power source from 1.7 to 3.6 V.

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2 Block diagram

Battery or External Supply

SIMPLE SUPPLY FILTER

INTERNAL 2.45 GHz Bluetooth

CERAMIC ANTENNA

BLUENRG-M2SA

(Only Capacitors)

RAM

Host Controller

MEMORY

interface

(24 kB)

I/0

Signals

(Optionals)

GPIO signals

ADC (2 ch. max)

SPI LINE

I2CBUS LINE

UART LINE

RF BALUN + Filter

INTERNAL

regulator

32 MHz internal

clock

Crystal 32 MHz

clock

FLASH

MEMORY

(256 kB)

BLUETOOTH

BLUENRG-2

32.768 kHz internal

clock

Crystal

32.768 kHz

clock

Figure 1: HW block diagram

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BlueNRG-M2SA

3 Software Development

3.1 Software development Kit

The BLUENRG-M2SA module embeds the BlueNRG-2 application processor. Refer to the BlueNRG-2 web page (http://www.st.com/en/wireless-connectivity/BlueNRG-2.html) to get access to:

• BlueNRG-2 datasheet

• development kit

• application notes

• user manuals

• tools & software

• design note and tips

Software and firmware should be configured taking into account the BLUENRG-M2SA specific configuration as described in the block diagram chapter. In particular the BLUENRG-M2SA module has:

• 32 MHz crystal oscillator

• 32 KHz crystal oscillator

• SMPS DC-DC converter

• 10

H SMPS inductor

The projects provided with the development kit should be customized defining as following:

• HS_SPEED_XTAL=HS_SPEED_XTAL_32MHZ

• LS_SOURCE=LS_SOURCE_EXTERNAL_32KHZ

• SMPS_INDUCTOR=SMPS_INDUCTOR_10uH

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BlueNRG-M2SA

2.4

GHz

Cortex

-M0

Comm.

Peripherals

Application

BLE

Protocol stack

2.4

GHz BlueNRG

dio

Link

Layer

Application Controller

3.2 Software Architecture

There are two possible software architectures:

1. Host-less mode (application processor): customer application runs on the BLUENRG-M2SA module. Many sample projects are available in the Development Kit.

BLE Application Processor

BlueNRG-M2SA

Application and Profiles

BLE Protocol stack

Link Layer

BlueNRG Radio

32MHz

GPIO

ADC

Figure 2: BLUENRG-M2SA - BLE Application Processor

2. Hosted mode (Network processor): the module is configured as network module controlled by an external host connected via SPI or UART. A project named DTM is available in the Development Kit that configures the BLUENRG-M2SA module as a network module.

External MCU

BLE Profiles

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Interface

BLE Network Processor

Interface

Figure 3:BLUENRG-M2SA as BLE Network Processor

BlueNRG-M2SA

°C

- 8 -

°C

4 Hardware specifications

General conditions (VIN= 3.3 V and 25 °C)

4.1 Absolute maximum ratings

Rating

Min

Typ.

Max

Unit

Storage temperature range Supply voltage, V I/O pin Voltage (VIO five-volt tolerant pin) RF saturation input power

Table 1: Absolute maximum ratings

-40

-0.3

4.2 Recommended operating conditions

Rating

Storage temperature range Supply voltage, V Signals & I/O pin voltage

(according supply voltage)

Table 2: Recommended operating conditions

Min

-40

1.7

4.3 Radio Features

Rating

Bluetooth version - 5.0 -

Min

Typ.

3.3

Typ.

+85

3.9

3.9 dBm

Max

+85

3.6

Max

Unit

Radiated transmit power +8 dBm Receiver sensitivity

RF Frequency 2402 - 2480 MHz HS_Startup_Time (*) 512 µs

Table 3: Radio features

-88 dBm

(*) The HS_Startup_Time has been measured according to the “Bringing up the BlueNRG-2 device” (AN4818). The HS_Startup_Time parameter is important because it permits minimization of the current consumption. A value that is too short prevents the BLUENRG-M2SA from correctly sending/receiving packets. Users should set the typical value as indicated in Table 3.

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BlueNRG-M2SA

µA

17 mA

4.4 Current consumption

Characteristics measured over recommended operating conditions unless otherwise specified. Typical value are referred to TA = 25 °C, V

Current consumption values has been taken using the “BlueNRG current consumption estimation tool”, configured to match the BLUENRG-M2SA configuration.

= 3.0 V

The tool is available on ST.com at: http://www.st.com/en/embedded-software/stsw-bnrg001.html Reported values have been taken configuring the tool as shown in the Figure 4.

Figure 4: Configuration of the “BlueNRG Current Consumption Estimation Tool”

Symbol

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Parameter

Supply current

Test conditions

Reset Standby Sleep mode Active Mode RX TX: +8 dBm (programmed) TX: 0 dBm 11 mA

Typ.

500

0.9

1.9

7.7

Unit

Figure 5: Typical current consumption profile at +5dBm

BlueNRG-M2SA

Figure 6: Typical current consumption profile at 0 d

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