Regarding the available I/O's on this board, I've noticed there are no buffers on the signal I/O's. I've looked at Arduino R3 (because it can connect to it) but didn't find any buffers over there also. Am I missing something here?
Because I think it is not a good practice design to neglect the buffers on I/O signals, in case there's some kind of problem.
It seems the I/O's are connected directly from the K64 to Arduino.