Hi, I have few questions to the gurus :-). 1. When using=A0LVP the programmer provides DATA (PGD) =A0and CLOCK (PGC) signals and few others. =A0=A0=A0 I like to know if the=A0PGC is only for the serial data processin= g or it drives ALL the =A0=A0=A0=A0PIC internal hardware modules (including the programme/data mem= ory clock) that takes part at the programing process. 2.=A0In=A0case i have a=A0PIC that operates with=A0external clock , and i n= eed preform "in circuit programing" of it, =A0=A0=A0 does the=A0total process time is limited only by the PGC+"Programming process design limitation" =A0or it got also some dependency at external clock. Thanks The Dude=A0. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .