I'm currently working on an Ethernet related issue on my boards.
On some boards the ethernet works without any issues, downloading huge files isn't an issue.
but on some boards the ethernet link goes up and down like crazy, especially when booting.
But on other boards everyting is fine.. This drives my crazy
I assume that my PHY and CPU (which share the same rail) don't get enough juice, because I'm still using LDOs. I will ditch the LDOs and start using the TPS563201 step down IC.
But I still have one question, how to terminate Ethernet properly? I'm using the HR911105A Magjack and saw multiple possibilities.
Which one is correct or better? And whats the difference? The first shows a part of the famous W5100 ethernet controller, the second shows the original schematic of the lichee pi zero.