Matthew Schinkel ha scritto: > They are not pull-ups, they are voltage deviders. They are only there for 5v to 3.3v conversion. SD cards are 3.3v Hmm, I see, ok I know. But from that schematic they really looked like pull-ups -- Ciao, Dario -- Cyberdyne -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist