The Alveo U55C card comes with a dual 4-lane QSFP28 that can accept modules up to 3.5W. The QSFP28 can connect interfaces up to 100G using optical modules or cables. A 161.1328125 MHz clock is provided to the QSFP28 interface such that different Ethernet IP cores can be enabled. The Alveo U55C card is shipped with eight unique MAC IDs. These IDs are located on a sticker on the back of the unit and can be retrieved through the card management solution IP. See the Card Management Solution Subsystem Product Guide (PG348) for more information.
Each connector is housed within a single QSFP cage assembly, located on the I/O bracket. The QSFP port number and location are shown in the following figure.
The following table provides the mapping of the I/O bracket QSFP port name to the QSFP FPGA GT Quad. In addition, for those using the AMD Vitis™ flow, it provides the GT index allocated in the Vitis software platform.
| QSFP Port | QSFP FPGA GT Quad | QSFP GT Index (Vitis Platform) |
|---|---|---|
| QSFP 1 | QUAD_X0Y6 | GTS0 |
| QSFP 2 | QUAD_X0Y7 | GTS1 |