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A microprocessor using a 3 MHz clock has three T ' states in each machine cycle. What is the time taken to complete the execution of an instruction if the instruction cycle of this instruction needs 4 machine cycles?
  • a)
    1 μs
  • b)
    333 ns
  • c)
    4μs
  • d)
    1333 ns
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A microprocessor using a 3 MHz clock has three T ' states in each ...
Number of T-states in each machine cycle = 3 So, number of T-states in 4 machine cycles = 3 x 4 = 12
Given, f = 3 MHz
Thus, time required for execution of the instruction
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Most Upvoted Answer
A microprocessor using a 3 MHz clock has three T ' states in each ...
To calculate the time taken to complete the execution of an instruction, we need to multiply the number of machine cycles by the number of T states in each machine cycle and divide by the clock speed.

Given:
Clock speed = 3 MHz
T states per machine cycle = 3
Number of machine cycles for the instruction = 4

Time taken = (Number of machine cycles) * (T states per machine cycle) / (Clock speed)
= 4 * 3 / 3 MHz
= 12 / 3 MHz
= 4 microseconds

Therefore, the time taken to complete the execution of the instruction is 4 microseconds.
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