> > I did read the section you quoted, but it isn't what I'd call > > "explicit". > > That section isn't, but others are. The portc pins table on the next > page explicitly describes the RC4 and RC5 roles for those pins as > digital inputs. Note 1 below table 10.6 on the following page > additionally says "RC5 and RC4 are only available as port pins > when the USB module is disabled (UCON<3> = 0)." But AFAICT that's not explicit either. You need to bsf ucfg,utrdis as well. I'd already tried ucon<3>=0 before trying the list -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist