32 kHz square wave in Lieu of Crystal : compatibility matrix ?

RE: 32 kHz square wave in Lieu of Crystal : compatibility matrix ?

Vincent Belaïche — Tue, 27 Jun 2023 08:39:39 GMT

Thank you for the feedback.

RE: 32 kHz square wave in Lieu of Crystal : compatibility matrix ?

Sigurd — Tue, 27 Jun 2023 08:38:04 GMT

[quote]is that possible to use the LFCLK calibration against HFCLK when the 32k source is external and when we use it with the SoftDevice by means of your work-around.[/quote]

No.

[quote]Could you please also provide from which nRF5SDK and SoftDevice versions your workaround is applicable, as we are not using the latest version for either of them.[/quote]

I have not tested it, but to my knowledge it should be applicable for all versions.

RE: 32 kHz square wave in Lieu of Crystal : compatibility matrix ?

Vincent Belaïche — Mon, 26 Jun 2023 15:27:28 GMT

Dear Sigurd ,

Thank you so much for providing this work-around. I have one more question : is that possible to use the LFCLK calibration against HFCLK when the 32k source is external and when we use it with the SoftDevice by means of your work-around.

Could you please also provide from which nRF5SDK and SoftDevice versions your workaround is applicable, as we are not using the latest version for either of them.

RE: 32 kHz square wave in Lieu of Crystal : compatibility matrix ?

Sigurd — Wed, 21 Jun 2023 18:15:39 GMT

Hi,

It's not an officially supported configuration for the SoftDevice, but it's possible to workaround. See e.g. this post: https://devzone.nordicsemi.com/f/nordic-q-a/61284/using-external-low-swing-clock-source-with-softdevice/249415#249415