Detailed Report - 2025.2 English - UG906

You can view the Report CDC details in the CDC Details section of the report. Use this section to:

• Open the schematic of a selected path by pressing F4.
• View an existing timing report.
• Generate a new timing report by right-clicking the entry.

Use the CDC Details to investigate unexpected CDC paths, find missing or incorrect timing exceptions, and locate synchronizers missing the ASYNC_REG property.

An example is shown in the following figure.

Figure 1. CDC Detailed Report

The CDC Detailed Report table includes the following columns:

Severity

Reports the severity level of the CDC rule: Info, Warning, or Critical.

ID

The unique identification number of the CDC rule, as listed in the CDC Rules and Description table.

Description

A short explanation of the CDC rule.

Depth

The number of synchronizer stages found. This column applies only to synchronizer topologies.

Exception

The timing exception applied to the CDC path.

Source (From)

The startpoint of the CDC timing path.

Destination (To)

The endpoint of the CDC timing path.

Category

Describes the path classification (for example safe, unsafe, unknown).

Source Clock (From)

The name of the source clock. This column appears only when you select CDC Details from the left pane of the Vivado Timing Report window.

Destination Clock (To)

The name of the destination clock. This column appears only when you select CDC Details from the left pane of the Vivado Timing Report window.