nRF52832 GPIO pin condition changes during Reset

RE: nRF52832 GPIO pin condition changes during Reset

hmolesworth — Wed, 13 Jan 2021 18:30:27 GMT

While Nordic review your findings, I can confirm something similar on one of my boards I just tested, although at a higher voltage. I would suggest perhaps fitting a small capacitor on the pin, rather than lowering the resistor value, as a workaround. I measured the internal pull-down at 14k with Vcc at 3v, presumably higher with decaying Vcc, 14k+ and few hundred uSec doesn't need much - say 100nF.

.. or invert the switch so a closure goes high instead of low ..

RE: nRF52832 GPIO pin condition changes during Reset

Marjeris Romero — Wed, 13 Jan 2021 15:31:19 GMT

Hi,

Sorry for the late reply. Could you attach your schematics for review here in Devzone? If you don't want to attach them in a public ticket you can create a private ticket for it.

Have you done any changes to you PCB/layout between your previous working batches and the latest ones?

Do you see the issues in all the boards from your new batch or just a few?

BR,

Marjeris