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Explain arbitration. What is priority arbitrator?

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Answer :

Arbitration:

IF multiple peripherals are connected to microprocessor or DMA controller or any resource and they request services simultaneously so which peripheral will get serviced first this is termed as arbitration.


Priority Arbiter:

Priority arbiter is the arbitration method which uses single purpose processor. Priority arbiter uses two common schemes one is fixed priority and second is rotating or round-robin priority arbitration. Peripherals make requests to arbiter and arbiter makes requests to the resource.

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