The Arm Cortex-M289+ MCU is a microcontroller unit (MCU) developed by Arm Holdings, a British semiconductor and software design company. Arm's Cortex-M series is widely used in embedded systems, serving industries such as industrial automation, automotive, consumer electronics, and IoT. The Cortex-M289+ is designed for high-performance, low-power applications, featuring advanced processing capabilities, real-time control, and connectivity options. It is part of Arm's portfolio of energy-efficient processors, which are licensed to various manufacturers for integration into their products.