The host of a microcomputer generally includes a CPU, memory, L/O interface circuit, and system bus.
Microcomputer is referred to as "microcomputer" or "microcomputer". Because it has certain functions of the human brain, it is also called "microcomputer". Microcomputer is a small electronic computer composed of large-scale integrated circuits. It is a bare metal based on a microprocessor, equipped with internal memory, input and output (I/0) interface circuits and corresponding auxiliary circuits. (Recommended learning: web front-end video tutorial)
The complete computer system includes two parts, namely the hardware system and the software system. The so-called hardware refers to the physical equipment that constitutes a computer, that is, the physical components composed of mechanical and electronic devices that have input, storage, calculation, control, and output functions.
The following introduces the various components of the computer host:
(1) Power supply: The power supply is an indispensable power supply device in the computer. Its function is to convert 220V AC It is the 5V, 12V, and 3.3V DC used in computers. Its performance directly affects the stability of other equipment, which in turn affects the stability of the entire machine.
(2) Motherboard: The motherboard is a platform on which various components in the computer work. It closely connects the various components of the computer together, and each component transmits data through the motherboard. In other words, the important "transportation hubs" in the computer are all on the motherboard, and its working stability affects the stability of the entire machine. The motherboard is generally a rectangular circuit board, on which are installed the main circuit systems that make up the computer. Generally, there are BIOS chips, I/O control chips, keyboard and panel control switch interfaces, indicator light connectors, expansion slots, motherboards and plug-in cards. DC power supply connectors and other components.
(3) CPU: CPU (Central Processing Unit) is the central processing unit, which is the computing core and control core of a computer. Its function is mainly to interpret computer instructions and process data in computer software. The CPU is composed of arithmetic units, controllers, registers, caches, and buses that implement data, control, and status between them. As the core of the entire system, the CPU is also the highest execution unit of the entire system. Therefore, the CPU has become the core component that determines the performance of the computer. Many users use it as a standard to judge the grade of the computer.
(4) Memory: Memory, also called internal memory (RAM), is an electronic storage device. It is composed of circuit boards and chips. It is characterized by small size, fast speed, storage when there is electricity, and emptying when there is no electricity. , that is, data can be stored in the memory when the computer is turned on, and all data will be automatically cleared after shutting down. There are four categories of memory: SD\DDR, DDR II, and DDR III, with capacities ranging from 128MB to 8GB.
(5) Hard drive: The hard drive is an external memory and is made of metal magnetic sheets. The magnetic sheets have a memory function, so the data stored on the magnetic sheets will not be lost whether the computer is turned on or parallel. . The capacity of the hard disk is very large, reaching the TB level. The sizes are 3.5 inches, 2.5 inches, 1.8 inches, 1.0 inches, etc. The interfaces include IDE, SATA, SCSI, etc., with SATA being the most common.
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