3 Replies Latest reply on Apr 13, 2011 6:49 AM by graa

    Detecting voltage with the PSoC

    jack.sullivan

      Hi All,

         

      This should be a very basic question, so forgive me. I'm trying to detect a voltage on a PSoC pin. It's either going to be 3V or 0V. The pin I am using is currently P0[0] and I have its drive set as Pull Down. I initialize the PRT0DR bit to 0, but I never read a high value when the voltage is 3V. Is there something that I am doing wrong?

         

      Essentially I want the PSoC to read a high value when a voltage is applied and a low value when the pin is floating.