Hello everyone, We've run into an interesting problem while trying to optimize an interface using the 16C63 serial port. The application involves sending just a few bytes to the PIC and then returning a much larger number from the micro. So, we hit on the (seemingly) clever idea of running the forward communication at 19K Baud thus avoiding the known BRGH=1 receive anomalies and the reverse at 115K maximizing our transfer rate. The problem is that it doesn't work! ...using the suggest coding from the data book. Does anyone have any experience with changing the serial port baud rate "on the fly"? Is there some mystic sequence necessary to "reset" or "re-initialize" the port beyond what is disclosed in the data book? Thanks in advance for any suggestions, Jen :-) _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866]