GATE 2017 EC – Question 26
The clock frequency of an 8085 microprocessor is 5 MHz. If the time required to execute an instruction is 1.4 $\mu$s, then the number of T-states needed for executing the instruction is
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Correct answer: (C) 7
Explanation
A 5 MHz clock has a period of $\frac{1}{5\ \text{MHz}} = 0.2\ \mu$s per T-state. An instruction that takes 1.4 $\mu$s therefore needs $\frac{1.4}{0.2} = 7$ T-states.