nRF534 - NFC undocumented registers

[Gabriele]

Hi,
I've read that when NFCT is operative the internal resistor of SoC is automatically adjusted.
For antenna tuning this resistance can be set to a fixed value through a register.
Is there a reference to the address and mode of use for this and related registers ?
BR

[Gabriele]

Hello,
Over here you can find an application note.
Truth be told, the document refers to nRF52 SoCs (paragraph 4.2.1). I guess something similar ought exist in nRF5340.

[ovrebekk]

Hi 

Thanks for the reference. I believe the same document should be valid for the nRF53 also. 

Unfortunately all the people that have some experience with NFC antenna tuning are currently on holiday. I will have to get back to you on the other questions when they are starting to come back in August. 

Best regards
Torbjørn

[Gabriele]

Sure Torbjørn
Thanks