Question

An 8085 microprocessor executes an instruction in 4 machine cycles containing 4, 3, 3, and 3 T-states respectively. If the clock frequency is 3 MHz, the execution time is approximately

• A. \(3.33\ \mu\text{s} \)
• B. \(4.33\ \mu\text{s} \)
• C. \(4.67\ \mu\text{s} \)
• D. \(13.33\ \mu\text{s} \)

Hint:

Whenever dealing with microprocessor execution times, remember: \[ \text{Total Time} = \frac{\sum \text{T-states}}{\text{Frequency}} \] Keep values fractional until the final step (\(\frac{13}{3}\)) to avoid rounding errors and quickly locate the repeating decimal answer choice.

Answer 1

The Correct Option is B