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General description

The BlueNRG-M2 is a Bluetooth low energy application processor modules compliant with Bluetooth® v5.0.

The BlueNRG-M2 module has been designed around the ST BlueNRG-2 SoC where its Cortex-M0 core can

execute both Bluetooth protocols and customer application. Optimized memory architecture includes 256 kB of

Flash memory and 24 kB of ultra-low-leakage RAM (with full data retention). A complete power-optimized

Bluetooth stack library provides:

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Master, slave, multiple role support

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GAP: central, peripheral, observer or broadcaster roles

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Simultaneous advertising and scanning

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Capability of being slave of up to two masters simultaneously

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ATT/GATT: client and server

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SM: privacy, authentication and authorization

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L2CAP

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Link Layer: AES-128 encryption and decryption

In the BLUENRG-M2SA module both 32 MHz and 32 kHz crystal oscillators are available. It has been designed to

leverage the BlueNRG-2 integrated DC-DC step down converter in order to achieve the best power consumption

in active mode. It also embeds a high efficiency chip antenna. 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-M2 module leverages all 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-M2 module has a wide set of peripherals available for customer applications (1 x UART interface, 1

PDM stream processor).

The BlueNRG-M2 module enables wireless connectivity into electronic devices, not requiring any RF experience

or expertise for integration into the final product. The BlueNRG-M2 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-M2 module allows applications to meet the tight advisable peak current requirements imposed with

the use of standard coin cell batteries. Optimized results are obtained when the embedded high-efficiency DC-DC

step-down converter is used (BLUENRG-M2SA). Instead, for the BLUENRG-M2SP the best performance in terms

of power consumption is achieved using a 1.8 V DC power supply. The BlueNRG-M2 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.

BlueNRG-M2

General description

DS13053 - Rev 2

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