STM32WB55CGU6 ST Mainstream Dual-Core Arm Cortex-M4/M0+ Wireless Multi-Protocol MCU 1MB Flash 256KB SRAM Bluetooth 5.2 Zigbee Thread USB UFQFPN-48

STM32WB55CGU6 Product Overview

STM32WB55CGU6 is a dual-core wireless MCU featuring an Arm Cortex-M4 (64 MHz, application) and Cortex-M0+ (32 MHz, radio), UFQFPN-48. 1 MB Flash, 256 KB SRAM, USB 2.0 FS device (crystal-less), Bluetooth 5.2/802.15.4 radio, Zigbee/Thread stacks, 12-bit ADC (12 ch), capacitive touch (TSC), LCD segment driver (up to 8×28), AES-256 HW crypto, true RNG, PKA public key accelerator, LP timers, RTC, 1×USART, 1×UART, 1×LPUART, 2×SPI/I2S, 2×I2C. Up to 30 x 5 V-tolerant I/Os. 1.71–3.6 V, -40–85 °C. As a member of the STM32WB wireless multi-protocol family, the STM32WB55CGU6 combines powerful application processing with reliable RF connectivity on a single chip, making it a comprehensive low-power wireless platform for IoT devices, smart home sensors, and portable medical equipment needing Bluetooth, Zigbee, or Thread connections.

STM32WB55CGU6 Core Features

Dual-Core Architecture: The STM32WB55CGU6 integrates a Cortex-M4 64 MHz (application) + Cortex-M0+ 32 MHz (wireless stack)

Memory: 1 MB Flash, 256 KB SRAM

Wireless Connectivity: STM32WB55CGU6 supports Bluetooth 5.2 (2Mbps, Mesh), Zigbee 3.0, Thread, 802.15.4

USB: USB 2.0 FS device (crystal-less)

Display & Analog: LCD segment driver (up to 8×28), 12-bit ADC (12 ch), capacitive touch

Security: AES-256, PKA public key accelerator, RNG, secure firmware update

Connectivity: 1×USART, 1×UART, 1×LPUART, 2×SPI/I2S, 2×I2C

Timers: LP Timer, GP Timers, RTC

I/Os: 30 (5 V-tolerant)

Package: UFQFPN-48

Temperature Range: -40°C to 85°C

STM32WB55CGU6 Applications

IoT Wireless Nodes: STM32WB55CGU6 powers Bluetooth Mesh sensors, Zigbee smart home devices, Thread border router nodes

Portable Medical Devices: The STM32WB55CGU6 is used in wireless health monitors, portable medical sensors

Smart Home & Lighting: Smart switches, LED drivers, thermostats

Industrial Wireless Sensing: Wireless sensor networks, industrial IoT gateway nodes

Consumer Electronics: Wireless remote controls, e-labels, beacons

STM32WB55CGU6 Key Advantages

Dual-Core Wireless SoC: The STM32WB55CGU6’s M4 core handles applications while the M0+ independently runs BLE/Zigbee stacks, simplifying development

Multi-Protocol Support: The STM32WB55CGU6 simultaneously supports Bluetooth 5.2, Zigbee, Thread, and proprietary protocols for flexible networking

1 MB Flash + 256 KB SRAM: Ample storage for wireless protocol stacks and application code

Integrated USB + LCD Segment Driver: Crystal-less USB communication and segment display expand HMI and data interfaces

Robust Hardware Security: AES-256 and PKA public key accelerator ensure wireless communication and firmware security

Ultra-Compact UFQFPN-48 Package: Tiny footprint saves PCB space for space-constrained wireless devices

Full Ecosystem Compatibility: Easy development with STM32CubeIDE/CubeMX/WPAN libraries

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FAQ

1. What is STM32WB55CGU6?
STM32WB55CGU6 is an ultra-low-power dual-core wireless multi-protocol MCU from STMicroelectronics, available in a UFQFPN-48 package. It integrates an Arm® Cortex®-M4 application processor and a Cortex®-M0+ network processor, supporting multiple wireless protocols including Bluetooth® LE 5.4, Zigbee®, Thread, and Matter.

2. What are the key specifications of STM32WB55CGU6?
The STM32WB55CGU6 features a dual-core architecture: Arm Cortex-M4 at 64 MHz (with FPU and DSP instructions) and Cortex-M0+ at 32 MHz (dedicated to real-time radio protocol stack processing); 1MB Flash program memory and 256KB SRAM; operating voltage 1.71V ~ 3.6V.

3. What package does STM32WB55CGU6 use?
The STM32WB55CGU6 is available in a UFQFPN-48 package (7mm × 7mm × 0.55mm), 48 pins with exposed pad. Moisture Sensitivity Level is MSL 3 (168 hours). The device is industrial-grade (Grade: Industrial).

4. What wireless protocols does STM32WB55CGU6 support?
Supports Bluetooth® LE 5.4 (compatible with SIG specification 5.2), IEEE 802.15.4-2011 standard, Zigbee® 3.0, Thread, and Matter. RF operating band is 2.405GHz ~ 2.48GHz, with data rate up to 2Mbps.

5. What applications is STM32WB55CGU6 suitable for?
IoT devices, smart home (Matter network end nodes), wearables, industrial wireless sensor networks, asset tracking, medical devices, smart buildings, and more.

6. What development tools support STM32WB55CGU6?
ST's official STM32CubeMX (graphical configuration tool) and STM32CubeIDE (integrated development environment). Comes with the STM32CubeWB firmware package. Debugging/programming supported via ST-Link series. Third-party tools from PEmicro and others are also available.

7. What is the operating temperature range and power consumption of STM32WB55CGU6?
Operating temperature range: -40°C to +85°C. Ultra-low power features: Shutdown mode: 13nA; Standby mode: 600nA (with RTC and 32KB RAM retention); Stop mode: 2.1µA (with RTC and 256KB RAM retention); Run mode: MCU < 53µA/MHz; Receive: 4.5mA ~ 7.9mA; Transmit: 5.2mA (0dBm) ~ 12.7mA.

8. What security features does STM32WB55CGU6 support?
Supports AES-256 hardware encryption engine, Public Key Accelerator (PKA) , and True Random Number Generator (RNG) ; supports Customer Key Storage feature; supports Flash Readout Protection (RDP) , Write Protection (WRP) , and Proprietary Code Readout Protection (PCROP) ; integrated Cortex-M4 Memory Protection Unit (MPU) .

9. What peripheral interfaces does STM32WB55CGU6 support?
Supports 30 GPIOs; 12-bit ADC (10 channels); communication interfaces include I2C, SPI, UART, USART, USB, and SAI; integrated LCD driver (up to 8×40 or 4×44); plus 16-bit/32-bit timers, low-power timers, and capacitive sensing channels (up to 18).

10. What are the alternative models for STM32WB55CGU6?
Alternative models in the same series include STM32WB55CGU6TR (tape-and-reel packaging version), STM32WB55CCU6 (256KB Flash version), and STM32WB50CGU6 (feature-reduced version). The STM32WB35xx series (up to 512KB Flash, 96KB SRAM) is also available.