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Which of the following mode is similar to the mode 4 of the 8253 timer?

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Which of the following mode is similar to the mode 4 of the 8253 timer?

(a) mode 5

(b) mode 6

(c) mode 0

(d) mode 1

This question was addressed to me in an internship interview.

I'm obligated to ask this question of Timer-II in chapter Basic Peripherals of Embedded Systems

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The correct choice is (a) mode 5

The best explanation: The mode 5 or the hardware triggered strobe is similar to the mode 4 or the square wave rate generator expect that the retriggering is done by the external gate pin.

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