I am having trouble with my W5500 circuit.
The clock, CSn, MOSI (Shown as channel 2) look great but MISO (shown as channel 1) is coupling with the CLK and is severely attenuated. I connected a 560pF cap from MISO to GND to reduce the coupling but the attenuation hasn’t changed. The net looks clean, no shorts to others.
When I cut the trace to the Nordic nRF the signal doesn’t change.
Changing the SPI transmission speed makes no difference.