[Figure 1, upper callout 14]
The Versal device (U1) banks 208/209/210/211 GTM transceivers are split and wired to the QSFPDD1 connector J1 and QSFPDD2 connector J2. The connectors are Molex connector 2147334000 rated at 112 Gbps per lane.
The transceivers are wired in an optimized pattern to allow the QSFPDD1 connector to be operated at 112 Gbps per lane and QSFPDD2 can be operated at 56 Gbps per lane. This configuration was chosen to provide 800GAUI-8 functionality. However, while QSFPDD1 is operating at 800 Gbps modes, QSFPDD2 cannot be used. To use QSFPDD2, QSFPDD1 is limited to 56 Gbps. This allows for both connectors to be operated simultaneously at 400GAUI-8 or similar modes.
For connectivity details, see the table in the Transceivers section and schematic page 57. See the Versal Adaptive SoC GTM Transceivers Architecture Manual (AM017) for more details on 112 Gbps GTM-Quad configurations.