But that problem applies equally to using a change-over switch or a single pole switch with pullup. __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb *Sent from my etch-a-sketch* On 29 March 2017 at 10:00, Richard Prosser wrote: > Off the top of my head:- so I may have missed something. > > Not a problem as long as the pin is defined as a digital input. I'm not > sure about all the PIC versions. The old ones used to boot with all IOs s= et > as inputs so there was not a lot of problems likely. However, if you get = a > variant that boots with the IO state set to output, you may have an issue > with a pin tied directly high (or low). > > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .