Read DBI Per-Bit Deskew and Centering - 1.0 English

Versal Adaptive SoC Programmable Network on Chip and Integrated Memory Controller 1.0 LogiCORE IP Product Guide (PG313)

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1.0 English

If the Read DBI option is selected for DDR4/LPDDR4, the DBI input pin is calibrated by writing a 101010... pattern into the DRAM, enabling the read DBI functionality, and reading back the pattern from the DRAM. The DRAM sends the data back as 11111111, (or 00000000_00000000 for LPDDR4), but the DBI pin itself has the 101010... pattern, that is used to calibrate the DBI input pin itself.