GTM202/203/204/205: QSFP-DD Interface

VPK120 Evaluation Board User Guide (UG1568)

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1.1 English

The ACAP (U1) bank 204 and 205 GTM transceivers are wired to the QSFP-DD connector J1. The ACAP (U1) bank 202 and 203 GTM transceivers are wired to the QSFP-DD connector J2. The connector is Molex connector 2147334000.

The lane selections to J1 have been optimized for 400GAUI-4 operation by ensuring that the legacy connections are connected to the appropriate GTM transceivers. J2 has limited 100+G support and is recommended for 58G per lane use cases such as 400GAUI-8 or 4x100GAUI-2. See the schematic pages 10 and 45 for connectivity details.

Note: QSFP-DD1, J1, supports legacy QSFP operation of 100+G using four odd channels only while full eight channels QSFP-DD operation supports up to 56 Gb/s. QSFP-DD2, J2, supports legacy QSFP 4 channel and QSFP-DD eight channel support up to 56 Gb/s (no 100+ Gb/s support).

See the Versal ACAP GTM Transceivers Architecture Manual (AM017) for more details on GTM-Quad limitations.