The Arm Cortex-M126+ MCU is a microcontroller unit (MCU) based on the ARM Cortex-M architecture, developed by Arm Holdings, a British semiconductor and software design company. Arm Holdings, headquartered in Cambridge, UK, is a subsidiary of SoftBank Group. The Cortex-M series serves industries such as embedded systems, industrial automation, consumer electronics, and IoT devices. The Cortex-M126+ MCU is designed for low-power, high-performance applications, offering features like real-time processing, energy efficiency, and integrated peripherals. It is widely used in smart sensors, motor control, and wearable technology. Arm's MCUs are licensed to various manufacturers worldwide, enabling diverse product implementations.