Using the Dallas 80C320 with Keil evaluation software. I am seeing the data sent to the Uc echoed back to the sender. I am not intentionally echoing the data. I can't find any mention of this in the data sheets or the Keil website. Anyone have any ideas?
It can be very easy to build in an accidental hardware echo. Crosstalk from the transmit line to the receive line is the usual culprit.