What is buses in cpu

And therefore , all computer programs are compiled to convert into machine code instructions in binary which computer CPU can decode and execute. Therefore , a bus consist of a group of cables so that a group of bits can be sent at a time through these buses.

The size of a bus is measured in terms number of Bits it can transmit at a time. Each wire can transmit one bit thus more number of wires in the bus can transmit more bits at a time. This number of wires in bus is referred as Bus Width. The Bus width is an important measure because it determines how much data can be transmitted at one time. For example, a 16 Bits bus can transmit 16 bits of data and a 32 Bit Bus can transmit 32 bits of data at a time.

Therefore a bus consist of a group of cables so that a group of bits can be sent through the bus. The Bus performance is important for optimal CPU performance. The bus speed is another important parameter for the bus performance. The bus speed is defined by its frequency expressed in Hertz. The bus frequency is the number of data packets sent or received per second. Each time that data is sent or received , It is called as one cycle. Let us summarize the bus width and the bus speed using the highway analogy.

If the bus width is the number of lanes available for the traffic and the bus speed is how fast the vehicles are moving on each of these lanes. The bandwidth is the product of Bus Width And Bus Speed and reflects the amount of traffic that the channel can convey per second.

All the device controller chips are now integrated into only two controller chips called chip-set. The chip-set consist of two prominently visible IC Chips called North-bridge and South-bridge placed on the motherboard. All these components are connected by using the system of bus wires which essentially carries three different types of information :.

The performance features and functionality of a computer system can be extended by adding an additional cards such as graphics card Or sound card. The expansion slots are the ports located on the motherboard of a computer system in which an expansion cards can be installed. The user can use these slots to insert additional expansion cards as per the functional requirements. An expansion bus is a group of wires OR PCB used to connect with the expansion slots on the motherboard.

These expansion slots are used for installing the expansion cards. The front side bus FSB represents one of the most important communication bus that connects some of the most vital components of the system.

And hence , the FSB is also referred as system bus. These components are connected using the FSB through one of the memory controller chip called the north bridge. The motherboard chip set consist of two controller chips. The front side bus is present on the motherboard embedded as a printed circuit board PCB wired connections running across the motherboard PCB. It can also be expressed as a ratio to CPU speed.

The front side bus FSB is bi-directional bus. This is the most comprehensive and unique C omputer Science And Programming Fundamentals course Online which will give you in depth understanding of most important fundamental concepts in computer science And Programming. Home About Course Contents 1. Introduction To Computer Science 2.

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What Is Control Unit? What Is Instruction Format? What Is Machine Instruction? Computer Bus. Typical PCs today run at speeds between 20 and 65Mhz. A bus transfers electrical signals from one place to another. Data travels between the CPU and memory along the data bus. The location address of that data is carried along the address bus.

A clock signal which keeps everything in synch travels along the control bus. But since each task such as saving a file is made up of several programmed instructions, and each of those instructions takes several clock cycles to carry out, a person sometimes has to sit and wait for the computer to catch up.

Dinesh Thakur is a Freelance Writer who helps different clients from all over the globe. For any type of query or something that you think is missing, please feel free to Contact us. The bus contains multiple wires signal lines with addressing information describing the memory location of where the data is sent or retrieved.

Each wire in the bus carries a bit s of information, which means the more wires a bus has, the more information it can address. For example, a computer with a bit address bus can address 4 GB of memory, and a computer with a bit bus can address 64 GB of memory. The illustration below shows the different types of computer buses and how they connect devices on the motherboard.

A bus is either a parallel or serial bus, and either an internal bus local bus or an external bus expansion bus. An internal bus enables the communication between internal components, such as a video card and memory.

A computer bus can transmit its data using either a parallel or serial method of communication. With a parallel bus, data is transmitted several bits at a time. However, with a serial bus, the data is transferred one bit at a time. With computer memory , a computer address bus is the bus containing the memory location memory address of where data is located in the computer memory. Once the computer understands where to get the information, the data bus is used to transfer that data.

A computer or device's bus speed is measured in MHz, e. The throughput of a bus is measured in bits per second or megabytes per second.