STMicroelectronics STM32WB05KZV7TR, 32 bit ARM Cortex M0+, STM32WB05 Wireless Microcontroller, 64 MHz, 192kB FLASH,

The STMicroelectronics Ultra-low power programmable Bluetooth Low Energy wireless SoC solution. It embeds state-of-the-art 2.4 GHz radio IPs, optimized for ultra-low-power consumption and excellent radio performance, for unparalleled battery lifetime

Ultra low power on reset (POR) and power down reset (PDR)