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|Hard Disk Data Bus|
Hard Disk Drives Data Bus
A collection of wires in which data is transmitted from one computer to another external drive. In personal computers, the data bus refers to internal bus. This is a bus that connects the internal computer components to the CPU and main memory. A bus is a common wire connecting various points in a circuit; examples are the ground bus and power bus. The data bus carries digital information.
A data bus is a group of wires connecting different parts of a circuit
with wire carrying a different signal. The data bus is connected to the
inputs of several gates and to the outputs of several gates. A data bus
may be time multiplexed to serve different functions at different times.
At any time only one gate may drive information onto the bus line but
several gates may receive it. In general, information may flow on the
bus wires in both directions. This type of bus is referred to as a bidirectional
VME is a 32-bit architecture with a 40 Mb/s throughput. Peripheral Component Interconnect (PCI) Bus PCI is in widespread use in the computer industry. Although PCI was developed by Intel, it is not tied to any specific processor. It appears that PCI may eventually replace the older ISA bus and is competing with VME for industrial use. PCI can be 32 or 64-bits wide. It has peak transfer rates of 132 Mb/s, with a sustained transfer rates around 25 Mb/s. The PCI standard is maintained by the PCI Manufacturers although it is an open interface, only 3 or 4 manufacturers actually produce to it. The larger board size, requiring more volume than the other types of interfaces that have smaller form factors. The bus architecture which is developed by IBM for the PC/XT and PC/AT and adopted for industrial applications.
The main function of the data bus is to carry digital information. A data bus can be viewed as a group of wires connecting different parts of a circuit with wire carrying a different signal. The data bus is connected to the inputs of several gates and to the outputs of several gates. A data bus may be time multiplexed to serve different functions at different times. The ISA architecture which is also developed by IBM is used for defector standard, and is widely used for high performance. Thus, the main function of the data bus is to connect the system to the external devices. There are many types of data bus, which can connect the PC to the mobile and other external device in order to download software’s. Thus data bus is a media which is transfer the data from one place to another.
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