The ARM Cortex-M261+ MCU is a microcontroller unit developed by ARM Holdings, a British semiconductor and software design company. ARM's Cortex-M series is widely used in embedded systems across various industries, including industrial automation, consumer electronics, automotive, and IoT. The Cortex-M261+ is part of the energy-efficient Cortex-M family, designed for real-time applications with features like low power consumption, high performance, and advanced security. ARM licenses its technology to manufacturers worldwide, enabling them to produce customized MCUs for diverse applications.