Basic structure
A microcontroller is a single-chip microcomputer system that includes a Central Processing Unit (CPU), Random Access Memory (RAM), Read Only Memory (ROM), and various input/output units.

extensive use
Single chip microcomputers, also known as microcontrollers, have been widely used in automatic measurement, instrumentation, industrial control, and household appliances.

Global manufacturers
Since the release of Intel's MCS-48 microcontroller in September 1976, major manufacturers around the world have successively developed over 60 series and thousands of varieties of microcontroller products. They have some differences in performance and control, and can achieve different functions, but the basic structure is still the same.