Hi [SNIP] > >A quicky explanation, > >Vcc == collector of a transistor >Vee == emitter of a transistor > >Vss == source of MOS device >Vdd == drain of MOS device > >Since PIC's are CMOS they use the latter naming convention. > >MD > Pretty quick, you even forgot to mention that it goes for oltage (V) at the mentioned terminals Vcc - Voltage at colector of transistor ...and so on ... Another minor detail. The names Drain and Source are not for MOS devices but for FETs (Field Efect Transistors), MOS or non MOS. The same goes for Colector and Emitter that are names applied to BJT (Bipolar junction transistors), no matter wich technology is used to produce them. [] Jorge =============================================================== cumprimentos / best regards Jorge Ferreira mailto://jorgegf@mail.telepac.pt ------ Make sure brain is in gear before engaging mouth ------- ===============================================================