PCB Design Guidelines (HSSI, EMIF, MIPI, True Differential, PDN) User Guide: Agilex™ 5 FPGAs and SoCs

ID 821801
Date 8/29/2025
Public
Document Table of Contents

6.1.3. Ground Plane and Return Path

A continuous and solid ground reference plane is crucial for data lines. Low impedance ground return path from the FPGA to DRAM devices should be provisioned.

For better return path and signal integrity performance, keep the distance between the ground stitching vias and signal transition vias within 80 mil.