Dear Nordic,
During testing we noticed that grounding a pulled up gpio input directly took a significant amount of current, around 250uA. This is as expected with 3.3V over 13KOhm pull up. Since we use a slider switch this drain is happening all the time. We can circumvent it partially by disabling the pin of the current slider position and only keeping the other slider position pins configured. But we do however also have 8 buttons which need to be able to detect all the time, and will be pressed quite a lot. Therefore we are thinking of adding an external pullup resistor to limit the current. What is the maximum resistance that still gives reliable detection on the gpio's, such that we minimize leaked current? Would a 1MΩ resistor still work?
Thank you!
- Gijs
