4 Replies Latest reply on Jun 22, 2015 12:20 PM by neal.o'hara

    IDAC in Sleep Mode power issues

    neal.o'hara

      Hello,

         

      I am working with the PSoC 4 BLE kit,

         

      and am trying to use the IDAC and sleep mode as a low-power current driver.

         

      The documentation lists sleep mode as 1-3mA. I am using the IDAC in 7bit 0-152uA mode, 

         

      and have a one pin (pushbutton) interrupt for chaning current level.

         

      I have built my program into release mode, set the Programming pins to GPIO,  

         

      left all other components in defualt off mode, and left all other GPIO in default Hi-Z mode.

         

      However, my PSoC still consistenly draws 6-7mA after entering sleep mode.

         

      To further confuse me, I have on 3 occasions, after a arbritary and large period of time, 

         

      seen the chip suddenly go into a 0.1 - 0.8mA  sleep mode (and still support pushbutton functionality).

         

      I cannot seem to reliably repeat this low-power mode, nor do I understand why the normal sleep mode

         

      is higher than the stated specs.

         

      Attached is my current project, and thank you for any advice.

         

       

         

      Neal