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The number of clock cycles required for an 8257 to complete a transfer is

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The number of clock cycles required for an 8257 to complete a transfer is

(a) 2

(b) 4

(c) 8

(d) none of the mentioned

The question was asked in an interview for job.

This question is from DMA Transfers and Operations in section DMA, Floppy Disk and CRT Controllers of Microprocessor

1 Answer

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by (49.2k points)
Correct option is (b) 4

Easy explanation: The 8257 uses four clock cycles to complete a transfer.

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