I am trying to monitor the System_reset pin on the beaglebone black (Rev C) expansion header to determine when I can use the gpio pins of the beaglebone black. When the beaglebone black is powered up the voltage is 3.3V, but after pressing the power_button the beaglebone shuts down and the voltage on the system_reset pin only drops to 1.2V. This is not a low so I cannot tell when the system shuts down. On my previous version of beaglebone the voltage dropped to 0V. Is there a problem with my current device?