Microcontrollers and processors serve as the core computing and control components in modern electronic systems. A microcontroller, or MCU, integrates a processor core, memory, input/output interfaces, timers, and various peripherals onto a single chip, making it compact, cost-effective, and ideal for real-time control tasks in embedded applications such as home appliances, automotive electronics, industrial automation, and IoT devices. In contrast, general-purpose processors, including CPUs and MPUs, emphasize high-speed arithmetic operations, complex data processing, and multitask management, often requiring external memory and peripheral circuits to support operating systems and intensive computing workloads in computers, servers, and smart devices. Together, they enable intelligent decision-making, signal processing, and system control across countless electronic products.