WIZ550io is an auto configurable Ethernet controller that includes a W5500 (TCP/IP hardwired chip and PHY embedded), a transformer and RJ45.

It has a unique official MAC address and configures the network setting automatically. When powered on, WIZ550io initializes itself with embedded MAC and sets the default IP address ( and it can be pinged. Therefore, users are not required to write MAC and network information like IP address, Subnet mask and Gateway address. The WIZ550io is an ideal product for users who want to develop their Internet enabling systems rapidly.


Key Features
  • Plug-in Network Module
  • Usable without H/W design for W5500, transformer & RJ-45
  • Fast evaluation for W5500 & MCU in the target board
  • Built-in MAC Address (48bit Global Unique ID)
  • Auto-Network configuration with default IP address
  • No MCU programming for PING check
  • Provide binary to edit default IP address
  • Support 8 independent hardware sockets
  • Support high speed SPI interface
  • Support interface board for Arduino, TI’s MSP 430 LaunchPad & Renesas’s GR-Kurumi boards
Pin Assignment

WIZ550io Documents

  • Latest Information about WIZ550io
  • Hardware Pins
  • SPI Operation
  • Timing Diagram
  • Block Diagram & Schematic
  • Dimension

WIZ550io Hardware Guide

  • WIZ550io Schematic
  • WIZ550io Part List


  • AX1 Loopback Test Program, Install version