W5100 Ethernet Shield

From ITEAD Wiki
Revision as of 06:19, 11 June 2014 by Ivy (Talk | contribs)

Jump to: navigation, search


W5100 Ethernet shield.jpg

W5100 Ethernet shield is a WIZnet W5100 breakout board with POE and Micro-SD designed for Arduino platform. 5V/3.3V compatible operation voltage level makes it compatible with Arduino boards, leafmaple, and other Arduino compatible board.

Go shopping W5100 Ethernet Shield (IM120911007)


  • With Micro SD interface
  • 5V/3.3V double operational voltage level
  • 10Mb/100Mb Ethernet socket with POE
  • All electronic brick interface are broken out
  • Operation temperature: -40℃ ~ +85℃


PCB size 55.88mm X 68.58mm X 1.6mm
Power supply 5V
Communication Protocol SPI
RoSH Yes

Electrical Characteristics

Specification Min Type Max Unit
Power Voltage 3V - 5.5 VDC
Input Voltage VH: 3 - 5.5 V
Input Voltage VL: -0.3 0 0.5 V
Current Consumption - - 100 mA



Arduino PIN Description
D0 Rx/Breakout
D1 TX/Breakout
D2 Breakout
D3 Breakout
D5 Breakout
D6 Breakout
D7 Breakout
D8 Breakout
D9 W5100_Reset
D10 W5100_CS
A0 Breakout
A1 Breakout
A2 Breakout
A3 Breakout
A4 IIC_SDA/Breakout
A5 IIC_SCL/Breakout


When install W5100 Ethernet shield to Iteaduino, please check the operation voltage level of development board. If the voltage is 3.3V (IFLAT32,Leafmaple), set the Operation Level Setting switch to 3.3V. If the voltage is 5V(Arduino), set the Operation Level Setting switch to 5V.

Iteaduino communicates with both the W5100 and SD card using the SPI bus. This is on digital pins 11, 12, and 13 on the UNO/Duemilanove and pins 50, 51, and 52 on the Mega. On both boards, pin 10 is used to select the W5100 and pin 4 for the SD card. These pins cannot be used for general I/O. On the Mega, the hardware SS pin, 53, is not used to select either the W5100 or the SD card, but it must be kept as an output.

Note that because the W5100 and SD card share the SPI bus, only one can be active at a time. If you are using both peripherals in your program, this should be taken care of by the corresponding libraries. If you're not using one of the peripherals in your program, however, you'll need to explicitly deselect it. To do this with the SD card, set pin 4 as an output and write a high to it. For the W5100, set digital pin 10 as a high output.

Indicator LED

The shield contains a number of informational LEDs:

  • LNK: indicates the presence of a network link and flashes when the

shield transmits or receives data

  • FEX: indicates that the network connection is full duplex
  • SPD: indicates the presence of a 100 Mb/s network connection (as

opposed to 10 Mb/s)

  • RX: flashes when the shield receives data
  • TX: flashes when the shield sends data
  • COL: flashes when network collisions are detected


Datasheet for W5100 Ethernet Shield

Schematic for W5100 Ethernet Shield

Useful Links