The Arm Cortex-M34 is a 32-bit microcontroller unit (MCU) based on the ARMv8-M architecture, developed by Arm Holdings, a British semiconductor and software design company. It is part of the Cortex-M series, which serves industries such as industrial automation, automotive, consumer electronics, and IoT. The Cortex-M34+ MCU variant enhances security and real-time performance, featuring TrustZone technology and DSP capabilities, making it suitable for applications requiring robust safety and connectivity. Arm licenses its designs to various manufacturers globally, enabling them to produce customized MCUs for embedded systems.