The following figure shows a decoupler for an AXI4-Slave interface which requires no clock domain crossing.
Figure 1. Example 1 With No Clock Domain Crossing
The following figure shows the same example, but with a three-stage clock domain crossing synchronizer. Because there is no AXI clock in this example, a reference clock for the control interface is automatically included.
Figure 2. Example 1 With Three Stages of Clock Domain Crossing
