3.2.1. Intel® Stratix® 10 EMIF DQS Tracking
DQS tracking is enabled for QDRII/II+/II+ Xtreme, QDR-IV, and RLDRAM 3 protocols; it is not available for DDR3 and DDR4 protocols. For QDRII/II+/II+ Xtreme, QDR-IV, and RLDRAM 3, DQS tracking does not need a specific command to initiate tracking, because the read capture clock/strobe is free running. Tracking happens constantly and automatically when the circuitry is enabled.
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