Introduction

The W5500 Ethernet mainboard is the newest member of the DFRobot Ethernet family. It Is a

microcontroller based on the ATmega32u4 and W5500 Ethernet chip with the same footprint as

an Arduino Leonardo board, as well as being compatible with most Arduino shields and sensors,

making it suitable for many kinds of IOT applications. The W5500 chip is a hardwired TCP/IP

embedded Ethernet chip that provides easy internet connection for embedded systems. The board

has the TCP/IP stack, 10/1000 ethernet MAC and PHY embedded, allowing internet connectivity

in the users application using just the board and nothing else. The W5500 Ethernet mainboard

uses a high-efficiency SPI protocol which supports a speed of 80MHZ for high speed network

communication. In order to reduce power consumption it also includes WOL (wake on LAN)

and power down modes. The board can be powered using a regular VIN, or POE as the power

supply. It also integrates a power regulation chip that allows it to work under a complex

environment.

Specification



Microcontroller: Atmel Atmega32u4 (Arduino Leonardo) 



External Input Voltage Range (recommended): 7V~20V DC  



External Input Voltage Range (limit): 6‐23V 



POE Input Voltage: 48V AC/DC (802.3af standard PD device) 



Digital I/O Pins: 20 



Analog I/O Pins: 6 



DC Current per I/O Pin: 40 mA 



Flash Memory: 32 KB (ATmega32u4) (4KB used by bootloader) 



SRAM: 2 KB (ATmega32u4) 



EEPROM: 1 KB (ATmega32u4) 



Clock Speed: 16 MHz 



PHY: WIZnet W5500 



PHY Clock Speed: 25MHz 



Dimension: 73.5 x 53.5x15mm 

 

 

Pinout Diagram

We recommend that you remove the jumper caps if you don't need to use the W5500 reset

and interrupt functions, or pins 7, 8, 11 or 12 may not function properly.