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

ID 683106
Date 12/19/2023

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Document Table of Contents LPDDR3 Data, Data Strobe, and DM Signals

LPDDR3 devices use bidirectional and differential data strobes.

Differential DQS operation enables improved system timing due to reduced crosstalk and less simultaneous switching noise on the strobe output drivers. The DQ pins are also bidirectional. DQS is edge-aligned with the read data and centered with the write data.

DM is the input mask for the write data signal. Input data is masked when DM is sampled high coincident with that input data during a write access.