DDR4 UDIMM and SODIMM Interfaces - 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

The minimum UDIMM/SODIMM interface configuration is single rank 64-bits while the maximum is dual rank 72-bits. For all single rank configurations there will be two pinout options; either Optimum or Rank Expansion. For all dual rank configurations the only option will be Optimum because it is already using the Rank Expansion pinout. If future applications will only use single rank devices then the pinout can be left at Optimum. If future applications require single or dual-rank devices then Rank Expansion is required. Generate the pinout for a 72-bit DQ width for future ECC support. Ensure the appropriate Command/Address Parity, DM/DBI, and Pinout Swapping options are selected when generating the pinout. Generate the maximum future pinout as Dual-Rank to ensure that the additional DDR4 output clock and control signals required for the second rank are included in the hardware design.