2 Replies Latest reply on Jul 1, 2014 6:19 PM by ArvindS_76

    GPIO Settings to achieve low power consumption during sleep

      Hi,

       

      I'm currently trying to reduce power consumption during sleep mode. The current during sleep is now ~40uA which is a little too high

      to satisfy our initial requirement of 20uA. With a simpler application I achieved around 30uA which would help us.

       

      I noticed that I can set the GPIO pins that we use to drive LEDs as input with a pull down to achieve relatively low currents compared to leaving them floating.

       

      We also have a number of unconnected pins that I leave unconfigured for now, I would like to know the default configuration of those.

      Notice that I'm using gpio_configurePin() instead of whatever is provided with bleprofile_GPIOInit(). Do I have to configure them in any specific way?

       

      Is there any action I should take to configure the GPIO pins before allowing the sleep modus? I would assume setting them as inputs or to 0V would help, but I guess you have some guidelines for this event already.

       

      Would using GPIO_GLOBAL_INPUT_DISABLE help me in anyway? I couldn't find any example code but it sounds interesting.

       

      I'm pretty sure somebody asked this before but I couldn't find any good info with the search engine.

       

      Regards,

       

      Kilian