STM32WB35CEU6A datasheet(24/196 Pages) STMICROELECTRONICS

24 / 196 page

Functional overview

STM32WB55xx STM32WB35xx

24/196

DS11929 Rev 14

It integrates a 2.4 GHz RF transceiver and a powerful Cortex®-M0+ core, on which a

complete power-optimized stack for Bluetooth Low Energy protocol runs, providing

master / slave role support

•

GAP: central, peripheral, observer or broadcaster roles

•

ATT/GATT: client and server

•

SM: privacy, authentication and authorization

•

L2CAP

•

Link layer: AES-128 encryption and decryption

In addition, according to Bluetooth specification 5.3, the Bluetooth Low Energy block

provides:

•

Multiple roles simultaneous support

•

Master/slave and multiple roles simultaneously

•

LE data packet length extension (making it possible to reach 800 kbps at application

level)

•

LE privacy 1.2

•

LE secure connections

•

Flexible Internet connectivity options

•

High data rate (2 Mbps)

The devices support Piconet topology (master with up to eight slaves), Scatternet topology

(master with up to six slaves and dynamically as slave with up to two masters, or master

with up to four slaves and dynamically as slave with up to four masters), and multi slave

topology (slave with up to eight masters).

The device allows the applications 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 only 7.8 mA at the

highest output power (+6 dBm).

The power efficiency of the subsystem is optimized: while running with the radio and the

applicative cores simultaneously using the SMPS, the Cortex®-M4 core consumption

reaches 53 µA / MHz in active mode.

Ultra-low-power sleep modes and very short transition time between operating modes result

in very low average current consumption during real operating conditions, resulting in longer

battery life.

The Bluetooth Low Energy block integrates a full bandpass balun, thus reducing the need

for external components.

The link between the Cortex®-M4 application processor (CPU1) running the application, and

the Bluetooth Low Energy stack running on the dedicated Cortex®-M0+ (CPU2) is

performed through a normalized API, using a dedicated IPCC.

STM32WB35CEU6A Datasheet(PDF) 24 Page - STMicroelectronics

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