STMicroelectronics STM32WB wireless microcontrollers with Zigbee 3.0 support

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STMicroelectronics has added Zigbee 3.0 support, based on the Zigbee PRO protocol stack, to the STM32WB55 wireless microcontrollers, enabling STM32 developers to leverage the interoperability and power-saving features of Zigbee networking for projects such as home automation, smart lighting, smart building and IoT connectivity. Zigbee 3.0 unifies the features of Zigbee specifications for consumer and industrial applications, making it particularly suitable for smart home products.

ST’s Zigbee 3.0 software for STM32WB55 includes the Exegin Zigbee PRO protocol stack. This stack is used in Exegin products certified as Zigbee Golden Units and is approved as a reference stack for use by test laboratories. To further ease development, ST’s offer supports 46 Zigbee 3.0 clusters that help users quickly establish device capabilities. A further 21 clusters support legacy products.

The microcontrollers also support Thread and Bluetooth 5.0, with over-the-air update (OTA) capability. There are currently 10 STM32WB55 variants, offering a choice of package styles and Flash density from 256 KB to 1 MB. Further variants will give developers extra flexibility to meet application performance and cost targets.

The devices feature the Arm Cortex-M4 with floating-point unit, DSP instructions and a memory protection unit (MPU) that enhances application security. An Arm Cortex-M0+ coprocessor dedicated to managing the integrated IEEE 805.15.4 radio and the MCU’s cyber-protection features enable real-time low-layer operations to run smoothly without compromising application execution. The RF transceiver has a link budget of 106 dB, to ensure connections over distance.

ST’s ultralow-power microcontroller technologies and high feature integration, which include the radio balun circuitry, ensure the MCUs help designers meet tight power and size constraints in a wide range of IoT and wearable devices. There are rich analog and system peripherals, as well as cyber-protection and ID features including secure firmware installation (SFI), customer key storage, hardware public key authority (PKA) and cryptographic accelerators. Capacitive touch and LCD controllers simplify user-interface integration.

For more information: www.st.com/stm32wb.