not the first one with this Problem…using a Wiz850io (W5500 based ).
Based on the Schematic the Module is set to Autonegotation ON.
Using a Cisco - Switch (SG-200-26) i dont get a LinkUp until i set the used Port manuall to 100MBit.
Reading the PHYCFGR i can see that OPMD is 0 (= use HW Pins )
Manual settings this to 1 and OPMDC to 111 also gives no Change.
No way to get it working using Autonegotation. Any Ideas ?