Thats the problem of reading data sheets after midnight sometimes. Neil re= sponded off list about the ANSEL register...thats what I was missing from i= t and what I expected to find for the selection. = Thanks. Jinx wrote: > 16F677 is different from what I can tell as you "define" the analog > pin in ADCON0 when you go to read the input. ? Hi Alan, I don't recall the 877 being any different. ADCON1 sets the analogue/digital function of the pins. ADCON0 selects an ADC channel corresponding to a pin that is analogue. See 11.3 in DS30292B -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist = --------------------------------- Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great rates= starting at 1=A2/min. -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist