I have an xmega talking to a W5200 chip. I only send 32byte of data to a local server every 5 seconds. It looks good for a while, then after lets say half an hour or half day the W5200 SPI gets broken. Its MISO line become randomly an output even when the master did not finish to send the address and data byte number to be output.
I did try two W5200 already. I use an WIZ820IO.
I am going to try the parallel interface, maybe it is something wrong with the SPI. Both W5200 were manufactured in 2012.
Any help would be highly appreciated.