External Memory Interfaces Intel® Arria® 10 FPGA IP User Guide
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11.4.5.3. Package Deskew Recommendations for Intel® Arria® 10 Devices
As operating frequencies increase, it becomes increasingly critical to perform package deskew. The frequencies listed in the table are the minimum frequencies for which you must perform package deskew.
If you plan to use a listed protocol at the specified frequency or higher, you must perform package deskew.
Protocol | Minimum Frequency (MHz) for Which to Perform Package Deskew | ||
---|---|---|---|
Single Rank | Dual Rank | Quad Rank | |
DDR4 | 933 | 800 | 667 |
DDR3 | 933 | 800 | 667 |
LPDDR3 | 667 | 533 | Not required |
QDR IV | 933 | Not applicable | Not applicable |
RLDRAM 3 | 933 | 667 | Not applicable |
QDR II, II+, II+ Xtreme | Not required | Not applicable | Not applicable |