Description - Description - 2026.1 English - UG906

Vivado Design Suite User Guide: Design Analysis and Closure Techniques (UG906)

Document ID
UG906
Release Date
2026-06-23
Version
2026.1 English

This check applies to Versal adaptive SoC only.

In these devices, it is safe to time between the DPLL input clock and one of its output clocks only when the phase detector (CLKOUTx_PHASE_CTRL=01) is used and the CLKIN_DESKEW pin is connected to the CLKIN pin. In all other cases, the phase relationship between the master clock and the auto-derived clocks is unknown. The clock domain crossing between them must be considered asynchronous, and any path in the crossing must include synchronization logic in the destination clock domain.