> >Yes, right, but that seems to be no problem since I >>found to have an edge in every block of 8 bits. > > This fact is normally used to lock the regenerated receive clock to the > data > rate (which it seems you have already worked out), and so you could > probably > look at some scheme for seeing what your interrupt timing is relative to > the > clock edge, and adjust accordingly. yes, I think now its time to get me all the nice SW and HW and start working on the program. have just found out that 18F252 and 452 seem to be or become obsolete and replaced by 2520 and 4520 Lembit -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist