Single-chip microcomputer, the full name of a single-chip microcomputer, also known as a microcontroller, and used in embedded devices, is the central processing unit, memory, timer/counter, each A microcomputer in which input and output interfaces, etc. are integrated on an integrated circuit chip. Compared with general-purpose microprocessors used in personal computers, it emphasizes self-supply (without external hardware) and cost savings. Its most significant advantage is its small size, which can be placed inside the instrument, but the storage capacity is small, the input and output interface is simple, and the function is low. Because of its rapid development, the definition of the old single-chip microcomputer can no longer be satisfied, so it is called a more comprehensive range of microcontrollers in many applications. A single-chip microcomputer is integrated into almost every electronic and mechanical product used in modern human life.