FRDM‑MCXA366 is a compact and scalable development board for rapid prototyping with MCX A355, A356, A365, and A366 MCUs, ideal for industrial HMI, secure connected sensing, and high-performance control designs. It provides industry-standard headers for easy access to the MCU’s I/Os, integrated open-standard serial interfaces, and an on-board MCU-Link debugger. Designed to accelerate development of smart sensing, motor control, and industrial HMI applications, it includes SLCD, CAN-FD, a Mathematical Acceleration Unit (MAU) to improve performance in real-time motor control computations, SmartDMA/camera and FlexIO/LCD expansion headers, and support for security-enabled MCU features to simplify evaluation, expansion, and application development. Additional tools such as the Expansion Board Hub (EBH) for add-on boards and the Application Code Hub (ACH) for software examples are available through the MCUXpresso Developer Experience.