> The problem is that the USB peripheral needs a 48MHz clock to operate Yes, I did say "whether you can or do use one [a hexadecimal crystal] depends on the functional priorities" As this is on an FSUSB board there's not much Bill can do wrt accuracy of the actual baud rate without upsetting the USB Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .