Use TCXO as LFXO (nRF52)

RE: Use TCXO as LFXO (nRF52)

inushii — Thu, 13 Apr 2017 15:46:29 GMT

Hello, Could you please expand on why a 32MHz TXCO or other external clock source cannot be used with the HFCLK? Thank you!

RE: Use TCXO as LFXO (nRF52)

Hung Bui — Tue, 08 Nov 2016 12:31:58 GMT

@mzi: It's actually available at section 19.2.4 nRF52632_PSv1.1.pdf

RE: Use TCXO as LFXO (nRF52)

mzi — Tue, 08 Nov 2016 12:28:01 GMT

Thanks RK! I found the information in the online manual right now, I was working with PDF version of the manual until now where this information was missing completely. My bad.

RE: Use TCXO as LFXO (nRF52)

RK — Tue, 08 Nov 2016 12:00:00 GMT

You guess wrong - you can use an external source for the LFCLK. The information about that including the type of signals permissable and the pin connections, are all documented in the manual.

RE: Use TCXO as LFXO (nRF52)

mzi — Tue, 08 Nov 2016 11:51:01 GMT

And I guess it is the same with LFCLK?

RE: Use TCXO as LFXO (nRF52)

Hung Bui — Tue, 08 Nov 2016 11:09:47 GMT

Hi Martin,

On nRF52, the HFCLK was not made to work with external clock source other than the Xtal.