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STM32 is a family of 32-bit microcontroller and microprocessor integrated circuits by STMicroelectronics. STM32 microcontrollers are grouped into related series that are based around the same 32-bit ARM processor core: Cortex-M0, Cortex-M0+, Cortex-M3, Cortex-M4, Cortex-M7, Cortex-M33, Cortex-M55, or Cortex-M85. Internally, each microcontroller consists of ARM processor core(s), flash memory, static RAM, a debugging interface, and various peripherals.