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Topic: w5100 ethernet shield & Arduino Duemilanove 2009 not used pins (Read 1 time) previous topic - next topic


Hello all,

I can not seem to find a post that will give me what pins are free to be used when i use a w5100 ethernet shield & Arduino Duemilanove 2009 shield together

any one have a spreadsheet or a direction to point me.


Normally a ethernet shield uses the spi connection. The Pins 13(CLOCK), 12(MISO), 11(MOSI) and 10(Chipselect) are used for this connection and can't be used for other things.
If you also have an sd card slot on it, then usually the pin 4 is used as chip select for the card.
You can use all the other pins as normal.

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