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

ID 683741
Date 9/26/2022
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11.1.1.2.5. Write Leveling

In DDR3 SDRAM and DDR4 SDRAM interfaces, write leveling details the margin for the DQS strobe with respect to CK/CK# at the memory side.

The Timing Analyzer analyzes the write leveling timing path through an equation which considers memory calibration, calibration uncertainty and PVT variation as shown in the following figure.

Figure 92. Write Leveling Timing Analysis