Link bring-up, packet framing, lane training, PHY/digital split, MAC/PCS boundaries, and system-level bandwidth planning.
Try the section checkpoint, then review the Q&A
USB/Ethernet/MIPI failures cross MAC counters, PCS framing, PHY adaptation, and channel SI.
Illustrative review: a product-board link showed FCS errors and one lane's measured margin differed from the eval board. Configuration, lane mapping, clocks and channel evidence were compared before the package path was accepted as the discriminator.