Crystal reference and capacitors for w5500
Why, then, in all reference schematics I found (including wiznet schematic reference), CL0 and CL1 are 18pF ???


Double-check the BOM. I see a lot of crystals with &lt;10pF CL, especially in small SMD packages. The 18pF CL0/1 seem about right for those when you include trace and pin capacitances.