STM32 Arm Cortex MCUs - 32-bit Microcontrollers - STMicroelectronics
https://www.st.com/en/microcontrollers-microprocessors/stm32-32-bit-arm-cortex-mcus.html
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
https://en.wikipedia.org/wiki/STM32
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, such as the Cortex-M33F, Cortex-M7F, Cortex-M4F, Cortex-M3, Cortex-M0+, or Cortex-M0.
GitHub - stm32duino/Arduino_Core_STM32: STM32 core support for...
https://github.com/stm32duino/Arduino_Core_STM32
STM32 core support for Arduino. github.com/stm32duino/wiki/wiki. View license. STM32Cube MCU Packages including: The HAL hardware abstraction layer, enabling portability between different...