C. Resource Consumption
After file synthesis with the Xilinx XST tool and the
simulation analysis shown above, some numerical results
were obtained. These results reflect the hardware resources
consumption and timing performance of the processor.
Table III shows the number of cycles and time taken by
the processor to execute an instruction, considering a period
of 200 ns for the global clock signal (GCLK). Hardware
resource consumption for the complete processor
implemented in a Xilinx Spartan3 XC3S1000-5FG320
FPGA is shown in Table IV, where IO’s have the highest
utilization percentage; but on the other hand, the number of
slice flip flops is minimal due to the combinational nature of
the processor being capable of executing an instruction in
few clock cycles