The STMicroelectronics STM32WB55xx multiprotocol wireless and ultra-low-power devices embed a powerful and ultra-low-power radio compliant with the Bluetooth® Low Energy SIG specification 5.2 and with IEEE 802.15.4-2011. They contain a dedicated Arm® Cortex®-M0+ for performing all the real-time low layer operation. The devices are designed to be extremely low-power and are based on the high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 64 MHz This core features a Floating point unit (FPU) single precision that supports all Arm®single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) that enhances application security.

1x LPUART (low power)
2x SPI 32 Mbit/s
2x I2C (SMBus/PMBus)
1x SAI (dual channel high quality audio)
1x USB 2.0 FS device, crystal-less, BCD and LPM
Touch sensing controller, up to 18 sensors
LCD 8x40 with step-up converter
1x 16-bit, four channels advanced timer
2x 16-bit, two channels timer
1x 32-bit, four channels timer