2.1.4. Physical layer interfaces

You can replace the physical layer to enable flexibility in the implementation.

There are two interfaces in each direction. These are AXI stream compliant. See the ARM® AMBA® 4 AXI4-Stream Protocol Specification for more information.

Forward direction

These interfaces consist of:

AXI stream data interface

AXI stream data interface. The forward link width you define in the AMBA Designer GUI defines the data width of the interface.

AXI stream flow control interface

The number of response channels that are R and B for an AXI to AXI bridge defines the data width of the interface.

Reverse direction

These interfaces consist of:

AXI stream data interface

The reverse link width you define in the AMBA Designer GUI defines the data width of the interface.

AXI stream flow control interface

Provided QVN is enabled, the number of response channels, that is, AW, AR, and W multiplied by the number of virtual networks, defines the data width of the interface.

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