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Author Topic: Using the W5100 at 3V3 P.S.. needs SPI voltage buffers/level converter?  (Read 1345 times)
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Congratulations to the Arduino team for the Arduino ARM monster!

I want to build my own W5100 and Arduino network card. Using 3v3 at the uP I need to install the voltage level-converter for the SPI port?

If the response is yes, what are those devices that can run this function?

Best Regards!!
Frank

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The W5100 runs on 3.0V to 3.6V so you don't need any conversion to connect it to a 3.3V processor.  The inputs are also "5V Tolerant" so you don't need any conversion to connect it to a 5V processor.

http://www.wiznet.co.kr/Sub_Modules/en/product/Product_Detail.asp?cate1=5&cate2=7&cate3=26&pid=1011#tab
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