09-12-2016, 09:16 PM
(This post was last modified: 09-12-2016, 09:18 PM by MarkHaysHarris777.)
(09-12-2016, 11:30 AM)tkaiser Wrote: Do you have a 2GB board?
It's not about network environment, it's about environemtal conditions like supplied voltage. Are you guys able to measure voltage between PHY_VDD33 and GND?
All of my boards are 2G boards, and all of them have rock stable power; 5v @ 2.5A via the euler bus pin(4 5v+) and pin(6 ground).
PHY_VDD33 is easy to measure (its all over that end of the board, several access points). One of the easiest ways to measure it is where the 3v3-2v5 regulator (reserved for RGMII) might be located ; measure on regulator pin(3) ... see new schematic here
All voltages are measured correct (and stable) as compared between the board that works (GbE) and the board that does not work (GbE). Again both boards are working correctly otherwise, and both boards work brilliantly at 100mb/s. The board that does not work (GbE) is covered in cold solder joints on the PHY end of the board; I have never seen a commercial board look so bad, actually; but, its measured voltages are correct, clean, and stable.
marcushh777 
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please join us for a chat @ irc.pine64.xyz:6667 or ssl irc.pine64.xyz:6697
( I regret that I am not able to respond to personal messages; let's meet on irc! )