<p>➀ A microcontroller is an integrated circuit with a CPU, memory, and I/O peripherals, designed for specific control tasks in devices like appliances and industrial systems;</p><p>➁ Categorized into 8-bit, 16-bit, and 32-bit architectures, they vary in processing power for applications ranging from consumer electronics to automotive and medical systems;</p><p>➂ The article addresses FAQs on programming, selection criteria, and differences between microcontrollers and microprocessors.</p>