I was looking at some PIC pinouts for a new product. I would like to accomodate 16F877(A), 18F452 and 18F4520. To my horros I saw that the I/O pins of the 18F452 and 18F4520 are different: 18F452 has a full port D, 18F4520 has a full port A! Yet the migration document does not seem to mention this at all. Can anyone with 18F452->18F4520 migration experience comment on this? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist