Jinx wrote: >> The re-sync happens on the start bit of every byte. >> 1.7% isn't enough to cause a problem. > > Are there not some protocols/methods that may not explicitly > re-synch or am I thinking of something else ? You must be thinking of something else. The timing for each RS-232 character is relative to the leading edge of the start bit. Since each character has a start bit, the sender and receiver re-sync each character. For a 8 bit character, errors only accumulate for 9 1/2 bit times (leading edge of start bit to middle of stop bit). ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist