The Arm Cortex-M100+ MCU is a microcontroller unit series developed by Arm Holdings, a British semiconductor and software design company. These MCUs are widely used in industrial automation, consumer electronics, and IoT applications. Key products in this series include energy-efficient, high-performance microcontrollers designed for embedded systems. Arm Holdings, headquartered in the UK, provides these chips to various manufacturers for integration into smart devices, sensors, and control systems.