External Memory Interfaces Intel® Stratix® 10 FPGA IP User Guide

ID 683741
Date 3/11/2022
Public
Document Table of Contents

6.5.1.1. Dynamic On-Chip Termination (OCT) in Intel® Stratix® 10 Devices

Depending upon the Rs (series) and Rt (parallel) OCT values that you want, you should choose appropriate values for the RZQ resistor and connect this resistor to the RZQ pin of the FPGA.
  • Select a 240-ohm reference resistor to ground to implement Rs OCT values of 34-ohm, 40-ohm, 48-ohm, 60-ohm, and 80-ohm, and Rt OCT resistance values of 20-ohm, 30-ohm, 34-ohm, 40-ohm, 60-ohm, 80-ohm, 120-ohm and 240 ohm.
  • Select a 100-ohm reference resistor to ground to implement Rs OCT values of 25-ohm and 50-ohm, and an RT OCT resistance of 50-ohm.

Check the FPGA I/O tab of the parameter editor to determine the I/O standards and termination values supported for data, address and command, and memory clock signals.

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