Integrated MCUs extend access to wireless protocols

STMicroelectronics has expanded the STM32WB portfolio of dual-core multi-protocol microcontrollers (MCUs) with the STM32WB35 and STM32WB30 Value Line devices.

The low power MCUs integrate a 2.4GHz radio managed by an Arm Cortex-M0+ core with a 64MHz Arm Cortex-M4 for the main application. This, says STMicroelectronics ensures uninterrupted real time performance. They support Bluetooth Low Energy 5.0, Zigbee 3.0, OpenThread (IEEE 802.15.4) protocols and concurrent modes, with built-in security features. All stacks are fully certified and supported by ST. The STM32WB35 and STM32WB30 Value Line MCUs are suitable for large-scale IoT applications such as fleet and resource management, as well as asset monitoring and tracking.

They are supplied in a QFN48 package. They are pin compatible with existing STM32WB5x devices and share common MCU features, which allows users to scale and migrate designs. The MCUs integrate the radio balun, USB2.0 Full Speed device with crystal-less oscillator, embedded capacitors for 32MHz crystal, and DC/DC step-down converter to minimise the bill of materials (BoM) and footprint.

For RF performance they have programmable output power up to +6dBm and a 102dBm link budget for reliable connectivity over longer distances, explains ST. Low power consumption extends battery runtime.

All STM32WB products are supported in the market-proven STM32Cube ecosystem, a software development suite of embedded software libraries and software tools.

The STM32WB35 and STM32WB30 Value Line devices are available with up to 512kbytes of integrated flash memory and up to of 96kbytes of SRAM. There is also a quad serial peripheral interface (SPI) for external high speed memory. There is a selection of analogue peripherals, digital interfaces and fast I/Os, many of which are 5V-tolerant.

The STM32WB MCUs integrate secure firmware installation (SFI), hardware encryption for the application and radio stacks, hardware public key authority (PKA) and hardware accelerators for cryptographic algorithms. They also support secure over-the-air (OTA) firmware updates.

The STM32WB35 and STM32WB30 Value line are in production now.

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