SPRZ580 December 2024 AM62D-Q1
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.