nRF52810 Power Up Issue

[Harv77]

Can a "Pin Reset" recover the nRF52810 part if the part has encountered a slow voltage rise, greater than 60 ms, from 0 - 1.7V (described in the image below)?

[Simonr]

Hi

I spoke to one of our experts on the matter, and unfortunately this is the expected behavior, as the chip will need a valid POR event before being able to reset as you want. As the pin reset is configurable, the SoC won't be able to set it up correectly without a valid POR first. So the VDD rise time is a requirement I'm afraid. A possible solution might be to connect the supervisor chip to a MOSFET that delayed VDD until it is high enough.

Best regards,

Simon