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

ID 772538
Date 10/02/2023

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Document Table of Contents Dynamic On-Die Termination (ODT) in DDR4

In DDR4, in addition to the Rtt_nom and Rtt_wr values, which are applied during read and write respectively, a third option called Rtt_park is available. When Rtt_park is enabled, a selected termination value is set in the DRAM when ODT is driven low.

Refer to the DDR4 JEDEC* specification or your memory vendor data sheet for details about available termination values and functional description for dynamic ODT in DDR4 devices.