Well I have been doing a bit of reading and a lot of searching to try and find out what the max SPI buss speed is for the W5100 , the only reference I have found says it is 4Mhz but since I have the double speed bit turned on and the CPU clock is 16Mhz , then my buss is at 8Mhz and it is working fine does anybody know what it really is?
Regards Paul
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