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W5500 Datasheet, PDF (43/65 Pages) List of Unclassifed Manufacturers – Supports 8 independent sockets simultaneously
VERSIONR (W5500 Chip Version Register) [R] [0x0039] [0x04]
VERSIONR always indicates the W5500 version as 0x04.
W5500 Datasheet Version1.0 (August 2013)
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