I notice that the dongle has a 3.6V-5.5V input and a pin that sais 3.3V, I measured 3.3V on this pin so I was curious if I could run an IMU unit and an i2c/spi bridge requiring 3.3V from this pin? I could not easily find info on this, other than from the user guide pdf page 12 it sais "No reverse voltage protection on the power connections." but I am not quite sure what this mean?