https://devzone.nordicsemi.com/f/nordic-q-a/122081/using-grtc-to-output-the-lfclk-via-gpio-sourced-from-an-external-32-768-khz-crystalHi! I am designing a nRF54 based motion tracker that has an IMU onboard which can take an external clock signal for improved timing accuracy. Initially I had thought of just placing an external oscillator on the board solely for the IMU but after readingen-USTelligent Community 13Fri, 06 Jun 2025 20:40:37 GMThttps://devzone.nordicsemi.com/thread/538488?ContentTypeID=1Fri, 06 Jun 2025 20:40:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cb9aadd5-d9fa-4212-a5a0-a22eeb079548SimbiJohnson<p>Great to hear! Thanks for answering.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/538449?ContentTypeID=1Fri, 06 Jun 2025 14:17:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d5c5af24-f3b4-4c48-9a50-043b6da4acceAsbj&#248;rn<div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;">Hello Sindri</div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;"></div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;">Table 18 in 0.9 datasheet:</div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;"><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1749219448519v1.png" alt=" " /></div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;">Availability of GRTC.LFLPRC only in SystemOn would be the only thing I would be concerned about. Well, if you switch off the LFSRC you will kill the IMU as well of course. So make sure that IMU is ok with losing or to be halted if for some reason you need to switch LFSRC off.</div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;"></div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;"></div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;">Best regards</div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;">Asbjørn</div> <div style="background-color:rgba(255, 255, 255, 1);border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:inherit;font-weight:inherit;line-height:inherit;margin:0;padding:0;text-align:left;text-indent:0;vertical-align:baseline;"></div><div style="clear:both;"></div>