At 06:36 AM 11/1/2005 -0800, you wrote: >Well...from what I know...and been told by the factory....the analog >inputs do NOT have the clamping function, so driving in past the reference >can possible damage the input to the PIC. In fact....I've seen it.... Do you think the protection diodes (the one to Vss is a parasitic diode due to the isolation diffusion) somehow disappear when you change the relevant SFR to make a digital input analog? Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com ->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist