Hi,
I have attached a circuit that is used in ZYBO development board. I guess the signal PS_POR_B_500 is an input signal to ZYNQ that should be asserted by the power distribution network when the power is good and stable. The signal PS_POR_B_500 (PG_ALL) is connected to N-channel FET in the attached circuit. I need some help in understanding this circuit. Which pins are Gate, Source and Drain ? I guess Pin 1 is Gate and the other two are Drain and Source. Perhaps Pin 2 is Source and Pin 3 is Drain. Can someone please explain the flow of current when the Source at Pin 2 is connected to GND. What will be the voltage at Gate Pin 1 ?