Description - 2023.1 English - UG906

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

Document ID
UG906
Release Date
2023-05-16
Version
2023.1 English

This check applies to Versal adaptive SoC only.

In Versal adaptive SoC devices, it is only safe to time between the DPLL input clock and one of its output clocks 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 and the clock domain crossing between them should be considered asynchronous: any path in the crossing should have the proper synchronization circuitry in the destination clock domain.