STM32 Arm Cortex MCUs - 32-bit Microcontrollers - STMicroelectronics
Microcontrollers from the STM32 MCU family are based on Arm Cortex-M processors and designed to offer new degrees of freedom to MCU users.
STM32 - Wikipedia
STM32 is a family of 32-bit microcontroller integrated circuits by STMicroelectronics. The STM32 chips are grouped into related series that are based around the same 32-bit ARM processor core...