The Arm Cortex-M4 is a 32-bit RISC processor core developed by Arm Holdings, a British semiconductor and software design company. It is part of the Cortex-M series, which targets embedded applications in industries such as automotive, industrial automation, consumer electronics, and IoT. The Cortex-M4 core, including the Cortex-M412+ variant, is widely used in microcontrollers (MCUs) by various manufacturers for applications requiring efficient digital signal processing (DSP) and real-time performance. Key features include a floating-point unit (FPU), low power consumption, and high integration with peripherals. Companies like STMicroelectronics, NXP, and Texas Instruments license the Cortex-M4 architecture to produce MCUs for diverse industrial and consumer applications.