This section describes how to connect the AXI4-Stream data interfaces of the 40G/50G subsystem. The AXI4-Stream interface follows the standard Arm® AMBA 4 AXI4-Stream Protocol v1.0 Specification but makes extensive use of "user" signals. Refer to the AMBA AXI4-Stream Protocol Specification (ARM IHI 0051A) for a detailed description of the interface.
The 40G/50G High Speed Ethernet subsystem provides a 128-bit straddle packet AXI4-Stream interface for operations at 40 Gb/s and 50 Gb/s. Additionally, there is a choice of a 256-bit regular AXI4-Stream interface for the IP operating at 40 Gb/s only.