our company wants to use the WIZ820io (W5200) for TCP-communication in a product. At the implementation we can’t set all the socket registers to the right value. For example writing the source port register works fine, but writing to the destination port register doesn’t work. So the connunication via SPI works correctly (also checked with oscilloscope).
Is there a special command we have to use, before we can access the destination port registers?
Or is there a special order the commands have to be sent?