External Memory Interfaces Intel® Agilex™ FPGA IP User Guide

ID 683216
Date 12/19/2022

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10. Intel® Agilex™ FPGA EMIF IP – Controller Optimization

When designing an external memory interface, you should understand the ways available to increase the efficiency and bandwidth of the memory controller.

The following topics discuss factors that affect controller efficiency and ways to increase the efficiency of the controller.

Controller Efficiency

Controller efficiency varies depending on data transaction. The best way to determine the efficiency of the controller is to simulate the memory controller for your specific design.

Controller efficiency is expressed as:

Efficiency = number of active cycles of data transfer/total number of cycles

The total number of cycles includes the number of cycles required to issue commands or other requests.

Note: You calculate the number of active cycles of data transfer in terms of local clock cycles.