Mux-Controlled CDC - 2023.2 English

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

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2023.2 English

In the Mux-controlled CDC example, shown in the following figure, the multiplexer select signal is synchronized to the destination clock domain, clk_b.

Figure 1. Mux-Controlled CDC Example

Similar to CE-controlled CDC, there is no restriction on how the select signal is synchronized as long as it is reported as safe individually and the user is responsible for constraining the crossing delay on FF2_c.