Link Training: 2-Lane, 4-Lane, 8-Lane, and 16- Lane Components - 3.4 English

Versal Adaptive SoC CPM Mode for PCI Express Product Guide (PG346)

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3.4 English

The 2-lane, 4-lane, and 8-lane cores can operate at less than the maximum lane width as required by the PCI Express® Base Specification. Two cases cause the core to operate at less than its specified maximum lane width, as defined in these subsections.