The Arm Cortex-M391+ MCU is a microcontroller unit developed by Arm Holdings, a British semiconductor and software design company. Arm is renowned for its energy-efficient processor designs and licenses its technology to various manufacturers globally. The Cortex-M391+ MCU is part of Arm's Cortex-M series, targeting embedded systems and IoT applications. It serves industries such as industrial automation, consumer electronics, automotive, and healthcare. Key features include low power consumption, high performance, and real-time capabilities, making it ideal for smart devices, sensors, and control systems. Arm's MCUs are widely used by OEMs and developers for their scalability and robust ecosystem.