What is a microcontroller? The main features of a microcontroller? In what areas are microcontrollers used? And give examples?

Microcontroller is a kind of integrated circuit chip, is the use of ultra-large-scale integrated circuit technology with data processing capabilities of the central processor CPU, random memory RAM, read-only memory ROM, a variety of I/O ports and interrupt system, timer/counter and other functions (which may also include the display driver circuit, pulse-width modulation circuits, analog multiplexers, A/D converters, and other circuits) integrated into a silicon chip constitutes a small and complete microcomputer system

Microcontroller is a type of integrated circuit chips. A small but perfect microcomputer system on a single silicon chip

Characteristics of microcontrollers

Microcontrollers are small in size and highly integrated.

Microcontroller performance is stable and highly reliable.

Microcontroller has a high cost-effective.

Microcontrollers are used in places that require program control

such as industrial control, home appliances, urban transportation, high-grade toys, medical and so on.