https://devzone.nordicsemi.com/f/nordic-q-a/32569/details-of-internal-pin-circuitryWhat are the details of internal pin connection circuitry when connected as GPIO/IRQ vs ADC vs Comparator? Is there an internal pull down (what value)? Is there internal diode? ESD protection circuitry details? For example, I see different effects onen-USTelligent Community 13Wed, 21 Mar 2018 14:40:49 GMThttps://devzone.nordicsemi.com/thread/125384?ContentTypeID=1Wed, 21 Mar 2018 14:40:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f9fde58-5641-4eb0-b688-b04906e72f90ketiljo<p>It&#39;s a shottky diode. Hence the requirement to keep the voltage on a pin to max VDD + 0.3 V. Above this, the diode will start to conduct.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/125368?ContentTypeID=1Wed, 21 Mar 2018 14:01:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a6602e47-56ad-4586-9c04-772d2a8c0b9eScooter Dawkins<p>Could you provide details of the diode type and characteristics?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/125331?ContentTypeID=1Wed, 21 Mar 2018 10:51:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ff8d7c58-4278-48d0-b327-6394bc0ff8e4ketiljo<p>Please refer to the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/gpio.html?cp=2_1_0_19#concept_zyt_tcb_lr">GPIO pin details figure</a> in the product specification.</p> <p>The pin is connected directly to the ADC input mux when this is enabled, any pull resistors are then disconnected.&nbsp;</p> <p>ESD protection is always enabled. This mainly consists of diodes to VCC and GND.</p><div style="clear:both;"></div>