I finally got around to assemble the new cardsystem PCB.
Today I received the PCBs from Elecrow.
Version 2 of the cardsystem (yellow card) and the green 10x10cm card with three designs (connectioncard for cardsystem, TinySTM32 and USBSupply).
So I decided to try reflowing the ethernet phy to make sure that nothing is shorted.
After doing so the ethernet phy started replying to management commands 🙂
Altough I think that it might have shorted nRST and TX_EN together because the basic status register is always indicating jabber detection, and when i try to manually de-assert TX_EN the LAN8720A resets.
Another problem is that it will only detect a link if I set the switchport to 10Mbit.