On Feb 3, 2005, at 9:25 AM, Bob Axtell wrote: > from [start bit] on through the frame until the end of the STOP bit, > timing is precise. The receiver UART locks on at the beginning of the > START bit and subjects the remaining bits to a rigid timing test until > the end of the STOP bit, then the UART is released from its rigid > timing. Presumably the "problem" is with software uarts that check the full stop bit, and don't have time to "unsynchronize" before the next start-bit starts. BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist