Improving SSN Results - 2023.2 English

Vivado Design Suite User Guide: I/O and Clock Planning (UG899)

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2023.2 English

To improve SSN results when a violation occurs:

  • Use I/O standards that have a lower SSN impact for the failing group. Changing to a lower drive strength, a parallel-terminated DCI I/O standard, or a lower class of driver can improve SSN, for example, changing the SSTL Class II to an SSTL Class I.
  • Spread the failing pins across multiple banks. This reduces the number of aggressive outputs on the power system of one bank.
  • Spread the failing groups across multiple synchronous phases.
  • Add phase information.