Analog Digital PINs and Pull Up


#1

Hi! I was giving a look to the Bluz pinout and I’ve noticed that A6 and A7 pins are marked as digital pins, though they have an “analog name”. So? Are they analog or digital?
My second question is: because I need to use less space possible, I wanted to use pushbuttons without external resistors. Which pins allow pull up?
Thank you again :smiley:


#2

A6 and A7 are digital only, the nrf51 just didn’t have 8 analog pins to fill out all of them. We kept the naming to keep compatability, but they only support digital.

Any pin can support a pull up or down resistor, so there is no issue there.