Question

Consider the addition of a multiplier to the CPU shown in COD figure below:

I-Mem /D-Mem Register File Mux ALU Adder Single gate Register Read Register Setup Sign extend Control
​ 250ps 150ps 25ps 200ps 150ps 5ps 30ps 20ps 50ps 50ps

What is the clock cycle time with and without this improvement?

Answer 1

The clock cycle time without the improvement can be calculated by adding up the individual delays of each component in the CPU. The addition of a multiplier to the CPU would increase the clock cycle time.

Step-by-step explanation:

The clock cycle time refers to the time it takes for one complete cycle of a clock signal. Without the addition of a multiplier to the CPU, the clock cycle time can be calculated by adding up the individual delays of each component in the CPU. Using the given information, the clock cycle time would be 250ps (instruction memory access time) + 150ps (data memory access time) + 25ps (register file access time) + 200ps (multiplexer delay) + 150ps (ALU delay) + 5ps (adder delay) + 30ps (single gate delay) + 20ps (register read delay) + 50ps (register setup delay) + 50ps (sign extend delay) + 50ps (control delay).

If a multiplier is added to the CPU, it would increase the delay and therefore increase the clock cycle time. Since the question does not provide any information on the specific delay added by the multiplier, it is not possible to calculate the exact clock cycle time with the improvement.