> Consider what happens when you have a large capacitor (say 10uF for > arguments sake) and you turn off the power to the PIC system. What is the > lowest resistance for the capacitor to discharge through? The ESD protection > diode of course. I don't think MCLR has a diode to Vcc due to the high voltage programming feature. However, that just means all kinds of other unspecified and possibly damaging things can happen with a cap on MCLR. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads