W5500 Datasheet, PDF (11/65 Pages) List of Unclassifed Manufacturers – Supports 8 independent sockets simultaneously

The 12.4KΩ(1%) Resistor should be connected between EXRES1 pin and analog ground (AGND)
as below.
Figure 2. External reference resistor
The crystal reference schematic is shown as below.
Figure 3. Crystal reference schematic
W5500 Datasheet Version1.0 (August 2013)
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