The microcontrollers are based on ST’s low-power STM32L4 microcontroller, and offer a rich peripheral set with power-conscious performance.
Centred around a 64MHz Arm Cortex-M4 application processor core and an Arm Cortex‐M0+ network processor core, with up to 1Mbyte of on-chip flash and 256Kbytes of SRAM, the microcontrollers integrate a 2.4GHz radio transmitter optimised for low power consumption and high RF performance.
Multiple power saving modes include adaptive voltage scaling, 13nA shutdown mode, and an adaptive real-time accelerator to enable zero-wait-state execution from flash memory.
Security features including public key authorisation, customer key storage, and an elliptic curve encryption engine.
The highly integrated microcontrollers also include a crystal-less USB 2.0 Full-Speed device, 32MHz RF oscillator, analogue peripherals, and a Quad-SPI port to connect to external memory.
The STM32WB microcontrollers are supported by the P-NUCLEO-WB55 Nucleo Pack, a development kit that includes a Nucleo-68 Board with pre-mounted STM32WB55RG microcontroller, and a USB dongle with onboard STM32WB55CG microcontroller.
