What modules does the single chip microcomputer consist of?

Single chip microcomputer consists of three modules: arithmetic unit, controller and main register.

Arithmetic unit consists of arithmetic logic unit, accumulator and register. The function of ALU is to perform arithmetic or logical operations on the input data. The input source is two 8-bit data from the accumulator and the data register respectively. ALU can add, subtract, sum or compare the sizes of these two data, and finally store the results in the accumulator.

The controller consists of a program counter, an instruction register, an instruction decoder, a timing generator and an operation controller. It is the "decision-making body" that issues orders, that is, it coordinates and directs the operation of the whole microcomputer system.

Extended data

Single-chip microcomputer is a small and perfect microcomputer system which integrates the functions of CPU, RAM, ROM, various I/O ports, interrupt system and timer/counter with data processing ability on a silicon chip by VLSI technology, and is widely used in industrial control field.

Single-chip microcomputer is not a chip to complete a certain logical function, but to integrate a computer system into a chip. It is equivalent to a microcomputer. Compared with computers, single-chip computers just lack I/O equipment.

The chip became a computer. It is small in size, light in weight and cheap, which provides convenient conditions for learning, application and development. At the same time, learning to use single chip microcomputer is the best choice to understand the principle and structure of computer.

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