A Microcontroller is a small computer on a single metal-oxide-semiconductor integrated circuit chip.In modern terminology,it is similar to,but less sophisticated than,a system on a chip;a SoC may include a microcontroller as one of its components.A microcontroller contains one or more CPUs along with memory and programmable input/output peripherals. Microcontroller are designed for embedded applications,in contrast to the microcontroller used in personal computers or other general purpose applications consisting of various discrete chips.Microcontrollers are used in automatically controlled products and devices,such as automobile engine control systems,implantable medical devices,remote controls,office machines,appliances,power tools,toys adn other embedded systems.Mixed signal microcontrollers are common,integrating analog components needed to control non-digital electronic systems.Some microcontrollers may use four-bit words and operate at frequencies as low as 4 kHz,for low power consumption.A microcontroller is embedded inside of a system to control a singular function in a device.
