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STM32WB55

STM32WB55

STMicroelectronics
Dual-core wireless MCU family that integrates BLE and IEEE 802.15.4 stacks, useful when a microcontroller and radio are desired in one device.
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Overview

The STM32WB55 is a dual-core wireless microcontroller that combines an Arm Cortex-M4 for application tasks with an independent Cortex-M0+ dedicated to radio operations. It supports multiple 2.4GHz protocols including Bluetooth 5.3, Zigbee, and Thread, allowing for concurrent multi-protocol operation in a single chip.

Why Choose This Part

The dual-core architecture ensures real-time radio performance is not interrupted by application processing. With an integrated SMPS and extensive low-power modes down to 13nA in shutdown, it significantly extends battery life in field-deployed devices.

Applications

Smart Home Hubs
Integrated support for Zigbee and Thread allows the device to act as a gateway or node in Mesh networking environments.
Wearable Health Monitors
Low power consumption modes and a dedicated BLE stack make it suitable for battery-operated fitness and medical devices.
Industrial IoT Sensors
Leverages a -100dBm sensitivity and 6dBm output power for reliable long-range communication in factory environments.

Key Specifications

GPIO 30
Type TxRx + MCU
Protocol Bluetooth v5.3, Thread, Zigbee
Frequency 2.405GHz ~ 2.48GHz
Modulation GFSK
Memory Size 512kB Flash, 256kB SRAM
Sensitivity -100dBm
Mounting Type Surface Mount
Package / Case 48-UFQFN Exposed Pad
Power - Output 6dBm
Data Rate (Max) 2Mbps
Voltage - Supply 1.71V ~ 3.6V
Serial Interfaces ADC, I2C, SPI, UART, USART, USB
RF Family/Standard 802.15.4, Bluetooth
Current - Receiving 4.5mA ~ 7.9mA
Operating Temperature -40degC ~ 85degC (TA)
Current - Transmitting 5.2mA ~ 12.7mA
Supplier Device Package 48-UFQFPN (7x7)

Getting Started

Start development with the P-NUCLEO-WB55 pack, which includes a USB dongle and a Nucleo-64 board. Use the STM32CubeWB MCU Package for firmware examples and the STM32CubeProgrammer to flash the required wireless stacks to the dedicated radio core.

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