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I would like to share with you what kinds of computer buses can be divided into. I believe most people don't know much about it, so share this article for your reference. I hope you will gain a lot after reading this article. Let's learn about it together.

Computer bus can be divided into data bus, address bus and control bus. The data bus transmits the data that needs to be processed or stored back and forth between the CPU and the RAM; the address bus is used to specify the address of the data stored in the RAM; the control bus transmits the signal of the microprocessor control unit to the peripheral equipment.

Computer bus can be divided into data bus (Data Bus), address bus (Address Bus) and control bus (Control Bus), which is also called system bus.

Data bus (Data Bus): transfers data that needs to be processed or stored back and forth between CPU and RAM.

Address bus (Address Bus): used to specify the address of data stored in RAM (Random Access Memory).

Control bus (Control Bus): transmits the signal of the microprocessor control unit (Control Unit) to the peripheral device.

"data bus DB" is used to transmit data information. The data bus is a bi-directional three-state bus, that is, it can not only transfer the data of CPU to other components such as memory or Icano interface, but also transfer the data of other components to CPU. The number of bits of the data bus is an important index of the microcomputer, which is usually consistent with the word length of the microprocessor. For example, the word length of the Intel 8086 microprocessor is 16 bits, and its data bus width is also 16 bits. It should be pointed out that the meaning of data is in a broad sense, it can be real data, it can also be order code or status information, and sometimes even a control information, so in practical work, what is transmitted on the data bus is not necessarily just data in the real sense.

The "address bus AB" is specially used to transmit addresses. Because addresses can only be transferred from CPU to external memory or I _ Universe O port, the address bus is always one-way three-state, which is different from the data bus. The number of bits of the address bus determines the directly addressable memory space of the CPU. For example, if the address bus of an 8-bit microcomputer is 16 bits, the maximum addressable space of the 16-bit microcomputer is 2 ^ 16 = 64KB (x-bit processor refers to the number of bits (1,0) that the microprocessor can handle in a clock cycle, that is, word growth). The address bus is 20 bits, and the addressable space is 220 ^ 20 = 1MB. In general, if the address bus is n bits, the addressable space is 2 ^ n bytes.

The "control bus CB" is used to transmit control signals and timing signals. Among the control signals, some are sent by the microprocessor to the memory and the Imax O interface circuit, such as read / write signal, chip selection signal, interrupt response signal, etc., and some are fed back to the CPU by other components, such as interrupt request signal, reset signal, bus request signal, device ready signal and so on. Therefore, the transmission direction of the control bus is determined by the specific control signal, (information) is generally bidirectional, and the number of bits of the control bus should be determined according to the actual control needs of the system. In fact, the specific situation of the control bus mainly depends on the CPU.

The above is all the contents of the article "what kinds of computer buses can be divided into". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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