Power consumption of unimplemented pins?
From the TI Ultra-Low Power (ULP) Advisor Wiki:


  Known Issues
  
  Notice that ULP Advisor detects the number of ports &amp; GPIO pins on the
  device basing strictly on the device number and does not have the
  knowledge on the actual package for the device. Therefore, it always
  assumes the largest package available to the device. In the event that
  a smaller package is actually used in the application, certain port
  pins might not be available on the device package. If this is the
  case, this remark can be safely ignored as these pins are internally
  terminated to ensure lowest power consumption and therefore the
  application is not required to configure/terminate these port pins.