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What is the main advantage of the Asynchronous bus over synchronous bus?
Wiki User
∙ 15y ago
As far as I can tell, an asynchronous bus is generally considered slower in performance to a synchronous one. However, it has two useful advantages:
* An asynchronous bus allows a device to send or receive data payloads which are of varying sizes. Compare an internal bus, such as PCI, where two devices exchange data in blocks of 32 or 64 bits per clock cycle, and an asynchronous bus, such as USB 2.0, where two devices exchange data packets of up to 1024 bytes.
* As it is not bound by a clock cycle, an asynchronous bus allows a relatively slow input/output device to communicate at its own speed - that is, to take its time to find, read and prepare the information it needs to send, or to store the information received and prepare itself for the next incoming portion. When those two are taken into account, an assumption can be made that an asynchronous bus implementation would not require as high precision as a synchronous one to achieve stable, reliable transfers, although I'm not sure if this is actually true.
Hope I am correct and this helps.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoA synchronous bus has it's events type by a clock,the clock transmits the regular sequence of 0 & 1 of equal duration. a single 10 transmission is called bus cycle or clock cycle.
In an asynchronous bus a timing is maintain in a such a way that ocourance of one event on the bus follows & depend on the ocourance of previous events.
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