I have an application that will be greatly simplified if I can power the nRF52832 via the clamp diodes on the GPIOs. I have multiple GPIOs pulled up to around 3.3V with some nominal resistance in the lines. With a supercap on Vcc, the power rise is much too slow for a proper power-on reset. I can deal with that. Once the system is up and running, it works like a champ. But during the slow Vcc rise, as the various transistors turn on, current begins being drawn at about 1.7V at a rate that prevents further rise. Even holding Reset low does not help. Once Vcc is above about 2V everything is fine. Is there some programmable configuration register etc. that could prevent the chip trying to wake up until Vcc clears e.g. 2.0V? Is there a better way to do this without a bunch of external components?
