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What is a bus? What kinds of buses are there in microcomputers? What is the role of each?
What is a bus? What kinds of buses are there in microcomputers? What is the role of each?
The bus is a public communication trunk for transmitting information between various functional components of the computer. It is a transmission harness composed of wires. There are three buses in microcomputers: data bus, address bus and control bus; their functions are respectively It is: 1. Transfer data that needs to be processed or stored back and forth between the CPU and RAM; 2. Used to specify the address of the data stored in RAM; 3. Send the signal of the microprocessor control unit to the peripheral equipment.
#The operating environment of this article: windows10 system, thinkpad t480 computer.
What is a bus? What kinds of buses are there in microcomputers? What is the role of each?
Bus (Bus) is a public communication trunk for transmitting information between various functional components of the computer. It is a transmission harness composed of wires.
The bus is an internal structure. It is a common channel for CPU, memory, input and output devices to transmit information. The various components of the host are connected through the bus, and the external devices are connected to the bus through the corresponding interface circuits. , thus forming a computer hardware system. In a computer system, the common channel for transmitting information between various components is called a bus. Microcomputers use a bus structure to connect various functional components.
Bus types in microcomputers:
The computer bus can be divided into data bus, address bus and control bus, which are used to transmit data, data address and control signals respectively. .
Data Bus: Transfers data that needs to be processed or stored back and forth between the CPU and RAM.
Address Bus: Used to specify the address of data stored in RAM (Random Access Memory).
Control Bus: Transmits signals from the microprocessor control unit (Control Unit) to peripheral devices.
Data bus DB (Data Bus), address bus AB (Address Bus) and control bus CB (Control Bus) are also collectively called the system bus.
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What is the function of the address lines in the system bus?
Jul 19, 2022 pm 05:37 PM
The function of the address line is to select the main memory unit and I/O port. The full name of the address line is the address bus. It is a CPU or a unit with DMA capabilities. It is used to communicate that these units want to access (read/write) the physical address of the computer memory component/place; simply speaking, the address line is specifically used to transmit addresses. , determines where the information is sent.
Computer word length depends on which bus width
May 25, 2021 am 11:54 AM
Computer word length depends on the width of the data bus. The number of binary bits in a word is called the word length, which can be 8, 16, 32, or 64 bits. The word length is determined by the number (width) of the data bus lines of the microprocessor's external data path. The width of the data bus is an important indicator that determines computer performance. Most microcomputer data buses are 32-bit or 64-bit.
Can the bus be divided into two types according to its function: data bus and control bus?
Jul 21, 2022 pm 04:46 PM
mistake. Buses can be divided into five types according to their functions: 1. Data bus, which is used to transmit data information. The data bus is a bidirectional three-state bus that transmits data that needs to be processed or stored back and forth between the CPU and RAM; 2. Address bus, used to specify the address of the data stored in RAM; 3. Control bus, It is mainly used to transmit control signals and timing signals; 4. Expansion bus is a bus for data communication between external devices and the computer host; 5. Local bus is a first-level bus or management layer added between the ISA bus and the CPU bus.
What five parts does the hardware of a microcomputer consist of?
Aug 02, 2022 am 10:36 AM
The hardware of a microcomputer consists of five parts: 1. Calculator, a component in the computer that performs various arithmetic and logical operations; 2. Controller, which changes the wiring of the main circuit or control circuit and changes the resistance value in the circuit in a predetermined sequence. The master device that controls the starting, speed regulation, braking and reversal of the motor; 3. Memory, a memory device used to save information in modern information technology; 4. Input device, a device that inputs data and information into the computer; 5. , Output device, that is, the terminal device of the computer hardware system.
What is a bus? What kinds of buses are there in microcomputers? What is the role of each?
Dec 11, 2020 am 11:21 AM
The bus is a public communication trunk that transmits information between various functional components of the computer. It is a transmission harness composed of wires. There are three buses in microcomputers: data bus, address bus and control bus. Their functions are: 1. In the CPU Transmit data that needs to be processed or stored back and forth to RAM; 2. Used to specify the address of the data stored in RAM; 3. Transmit signals from the microprocessor control unit to peripheral devices.
How are CPU, memory, and I/O devices connected?
Dec 03, 2020 pm 02:55 PM
CPU, memory, and I/O devices are connected through a "bus". The bus is a connection channel between system components; the bus is a common channel for CPU, memory, and I/O devices to transmit information. The various components of the host are connected through the bus, and the external devices are connected to the bus through corresponding interface circuits, thus forming a computer hardware system.
What is the difference between can bus and 485 bus?
Jun 30, 2023 am 11:38 AM
The difference between can bus and 485 bus: 1. Communication method, CAN uses multi-node communication, and 485 uses a single node to control multiple slave nodes; 2. Communication speed, CAN data transmission speed is higher than 485; 3. Distance limitation, CAN communication The distance is between 40-500 meters, 485 can reach 1200 meters; 4. Data transmission reliability, CAN has higher data transmission reliability than 485; 5. CAN adopts a decentralized network structure, and 485 adopts star topology Structure; 6. Cost, CAN equipment and wiring costs are higher than 485.
What is the word length of Pentium microcomputer?
Feb 28, 2023 pm 03:50 PM
The word length of Pentium microcomputer is 32 bits. Pentium refers to the Pentium processor, which is the fifth-generation microprocessor series released by Intel in October 1992; the Pentium processor uses a 32-bit internal bus. The word length refers to the number of binary digits that the CPU can process in parallel at one time, and is determined by the number of data bus lines in the microprocessor's external data path.