Hi,
My customer use nRF52840 with nRF5 SDK 15.0.0.
They have come up against the difficulty that uart RX pin instability.
I have searched the DevZone and it's advised to have a pullup resistor on the RX pin.
What I want to know is, can I use internal pullup to avoid the problem?
in this post, it said we can adjust the default driver to do this with nRF52833, is it OK for nRFF52840 with SDK15.0.0?