RE: LFCLK source using internal RC or external crystal ?

JONATHAN LL — Tue, 13 Jul 2021 12:53:04 GMT

[quote user=""]From what I understand is that the BLE and UART implementation is based on HFCLK (32MHz crystal is already embedded for this), is this correct?[/quote]

Correct.

[quote user=""]"The LFRC frequency will be affected by variation in temperature."?[/quote]

This will also be true for a external crystal. We don't have a detailed chart on the variation.

Any LF source can be used for RTC it will only effect the accuracy and power consumption. So for a device wit out a LFXO you can still use the LFRC to get RTC for example.

In short; If you don't care about getting the lowest power consumption then having the external LF crystal is not that important.

Also you can request a schematic and layout review here on DevZone if you like. Just create a new ticket and name it HW review nRFXX and we will give you feedback.

Regards,
Jonathan