External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP User Guide

ID 772538
Date 10/02/2023

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7.3.4. Ground Plane and Return Path

A continuous and solid ground-reference plane is crucial for data lines, to ensure good signal integrity.

It is important to provide a low-impedance ground return path between the FPGA and DRAM devices, and to keep ground stitching vias within 80 mils from signal transition, for best return path on signal vias and improved signal integrity.