5 2013-05-22 fabian althaus The Arduino Ethernet Shield allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip (datasheet). The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield. The ethernet shield connects to an Arduino board using long wire-wrap headers which extend through the shield. This keeps the pin layout intact and allows another shield to be stacked on top. The most recent revision of the board exposes the 1.0 pinout on rev 3 of the Arduino UNO board. The Ethernet Shield has a standard RJ-45 connection, with an integrated line transformer and Power over Ethernet enabled. Arduino Ethernet Shield (Rev3) http://arduino.cc/de/Main/ArduinoEthernetShield Arduino Ethernet SD-Card Shield RJ45 arduino shield Ethernet Shield (Rev3) ICSP MISO

5V

ICSP SCK

ICSP MOSI

RESET

GND

D8

PWM D9

ETH CS

PWM D11

SPI/D12

SPI/D13

GND

AREF

A0

A1

A2

A3

A4/SDA

A5/SCL

RX/D0

TX/D1

D2

PWM D3

SDCS

PWM D5

PWM D6

D7

RESET

3V3

5V

GND

GND

VIN

IOREF

N/A

A4/SDA

A5/SCL