Post #1554213
2026-04-15 10:32 UTC
Would "connected to completely the wrong pins" have counted for anything but ethernet? Somehow this still negotiates a 100mbit connection.
Replies (1)
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@cibomahto@social.v.st 2026-04-18 15:29
With a small bit of rework, the PHY solidly negotiates a gigabit connection. Unfortunately this shows that the rgmii bus traces aren't matched well enough for 125MHz ddr- the best clock delay I could find resulted in a 75% packet loss at 1000Mbps, but if i force the connection to 100Mbps then runs flawlessly. That's all that is needed from this board rev, the goal was to verify basic functionality before spending time tuning things.