Explain the bus system.
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Today we are discus on Bus Concept:
The purpose of buses is to reduce the number of "pathways" needed for communication between the component, by carrying out all communication over single data channel. This is why the metaphor r of a "data highway" is sometimes used.
If only two hardware components communicate over the line, it is called a hardware port (such as a serial port or parallel port).
Characteristics of a Bus:
A bus is characteristic by the amount of information that can be transmitted at once. This amount, expressed in bits, corresponds to the number of physical lines over which data is sent simultaneously. A 32-wire ribbon cable can transmit at once.
Additionally, the bus speed is also defined by its frequency (expressed in Hertz) the number of data packets sent or received per second. Each time that data is sent or received is called a Cycle.
Bus Hierarchy and categories
The PC has hierarchy, in way of different buses. Most modern PCs have at least four buses. I consider them a hierarchy because each bus is to some extant further removed from the processor; each one connects to the level above it, integrating the various parts of the PC together. Each one is also generally slower than the one above it.
Today we are discus on Bus Concept:
Bus Concept:
A bus, in computing is a set of physical connection (cables, printed circuit etc.) which can be sheared by multiple hardware component in order to communicate with one another.The purpose of buses is to reduce the number of "pathways" needed for communication between the component, by carrying out all communication over single data channel. This is why the metaphor r of a "data highway" is sometimes used.
If only two hardware components communicate over the line, it is called a hardware port (such as a serial port or parallel port).
Characteristics of a Bus:
A bus is characteristic by the amount of information that can be transmitted at once. This amount, expressed in bits, corresponds to the number of physical lines over which data is sent simultaneously. A 32-wire ribbon cable can transmit at once.
Additionally, the bus speed is also defined by its frequency (expressed in Hertz) the number of data packets sent or received per second. Each time that data is sent or received is called a Cycle.
Bus Hierarchy and categories
The PC has hierarchy, in way of different buses. Most modern PCs have at least four buses. I consider them a hierarchy because each bus is to some extant further removed from the processor; each one connects to the level above it, integrating the various parts of the PC together. Each one is also generally slower than the one above it.
- The Processor Bus: This is the highest-level bus that the chipset uses to send information to and from the processor .
- The Cache Bus: Higher-level architectures, such as those used by the Pentium pro and Pentium II , employ a dedicated bus for accessing the system cache. This is something called a backside bus Conventional processor using fifth-generation motherboards and chipsets have the cache connected to the standard memory bus.
- The Memory Bus: This is a second-level system bus that connects the memory subsystem to the chipsets and the processor. In some system the processor and memory buses ate basically the same thing.
- The Local I/O Bus: This is high-speed input/output bus used for connecting performance-critical peripherals to the memory, Chipsets, and processor. For example, video cards, disk storage devices, high speed input/output networks interface generally use a bus f this sort.
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