The Arm Cortex-M23/M33+ MCU is a microcontroller unit developed by Arm Holdings, a British semiconductor and software design company. These MCUs are part of Arm's Cortex-M series, targeting embedded systems and IoT applications. The Cortex-M23/M33+ cores are designed for ultra-low-power, high-efficiency performance, serving industries such as industrial automation, consumer electronics, and smart devices. Key features include enhanced security (TrustZone), real-time processing, and energy efficiency, making them ideal for connected and battery-powered applications.