Why does the Arria® 10 Multi-Rate Ethernet PHY IP in USXGMII Auto-Negotiation mode fail in simulation?

Description

The Arria® 10 Multi-Rate Ethernet PHY IP default value of usxgmii_link_timer at register address 0x412 is 0x7c000. This default reset value sets the link timer to 1.6ms, which is too long in simulation.

Resolution

To work around this problem, set usxgmii_link_timer bit[19:14]=0x01 at address 0x412 to speed up the auto-negotiation process for simulation. This change sets usxgmii_link_timer to the fastest link timer value possible in this register i.e. 0.05ms.