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Electronics and Communication Engineering (ECE) : Microprocessors - Quiz(MCQ)
In 8257, if each device connected to a channel is assigned to a fixed priority then it is said to be in
A)
fixed priority scheme
B)
rotating priority scheme
C)
rotating priority and fixed priority scheme
D)
None of the above

Correct Answer : Option (A) :   fixed priority scheme


Explanation : In this scheme, the DRQ3 has the lowest priority followed by DRQ2 and DRQ1. The DRQ0 has the highest priority.

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