The Arm Cortex-M34+ MCU is a microcontroller unit developed by Arm Holdings, a British semiconductor and software design company. It is part of the Cortex-M series, designed for embedded applications in industries such as industrial automation, consumer electronics, automotive, and IoT. The Cortex-M34+ combines real-time processing with security features, making it suitable for applications requiring both performance and safety. Arm licenses its designs to manufacturers worldwide, enabling them to produce customized MCUs for diverse market needs.