SPRZ487E May 2022 – June 2024 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
Boot: Ethernet PHY Scan and Bring-Up Flow doesn't work with PHYs that don't support Auto Negotiation
ROM Ethernet (either RGMII or RMII) boot mode relies on PHY auto-negotiation to complete before checking for link status. Hence PHY that do not support auto-negotiation cannot work with this boot mode.
None, a PHY supporting auto-negotiation is required.