A microcomputer on a single chip, used to control some device such as an automobile engine or a toy
A single-chip microcomputer with on-board program ROM and I/O that can be programmed for various control functions
An application-specific microprocessor geared around a specific control function Also referred to as "computer chips "
from the Usenet list of frequently asked questions about microcontrollers, A microcontroller is a highly integrated chip which includes, on one chip, all or most of the parts needed for a controller The microcontroller could be called a ``one-chip solution'' It typically includes: CPU (central processing unit) RAM (Random Access Memory) EPROM/PROM/ROM (Erasable Programmable Read Only Memory) I/O (input/output) - serial and parallel timers interrupt controller By only including the features specific to the task (control), cost is relatively low A typical microcontroller has bit manipulation instructions, easy and direct access to I/O (input/output), and quick and efficient interrupt processing Microcontrollers are a ``one-chip solution'' which drastically reduces parts count and design costs
{i} (Computers) single integrated circuit that is designed to function as an embedded system (contains a CPU, RAM, ROM, I/O ports and timers)