> Label 1reads - 16F877A - I/P the other PIC16F877-20/P. > I was supposed to have 16F877A 20 Mhz. If it was from my I took the chip from the wrong tube :( Difference is mainly in programming. If your progger supports both you are probably OK. A progger that does not support the 16F877 is unlikely, proggers that don't support the -A exist. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu