We are encountering problems with the nRF52 resetting during ESD testing. We have a reset button external to the chip, the trace to which we suspect is acting as a receiving antenna for the sudden electromagnetic field changes. I'd like to add a filter cap on the reset line, but in order to choose the value properly I need to know if there are any constraints on the rise time of the reset signal when the button is released, or is the reset input Schmitt-triggered, for instance? I haven't found this specified in the data sheet, nor have I found a thread about this in this forum, though if there already is one I apologize for the duplicate and ask to be enlightened!
Thanks, Scott
