A microcontroller (MCU) is a compact, integrated circuit designed to execute specific control tasks within embedded systems. It combines a processor core, memory (such as RAM and flash), peripherals (like timers and I/O pins), and sometimes application-specific modules—all on a single chip. This integration makes microcontrollers ideal for real-time, deterministic applications that require low latency and power-efficient performance. MCUs are widely used in consumer electronics, automotive systems, industrial automation, and IoT devices where dedicated functionality is needed.