How should I
configure these pins to minimize current consumption?
ADC inputs - tie these directly to ground. The leakage current on the analog
pins is low –
typically 1nA. The digital pins have an internal pull-up to IOVDD. This
pull-up is typically 50Kohms. Because of the pull-ups, these pins can be left
unconnected. Another option is to tie them externally to IOVDD to minimize the
current flowing through the pull-up.