topic Re: Fxth87 internal oscilator in Sensors https://community.nxp.com/t5/Sensors/Fxth87-internal-oscilator/m-p/511591#M3230 <HTML><HEAD></HEAD><BODY><P>Hi Ales,</P><P></P><P>8MHz is provided by the HFO clock and this clock is off in STOP modes.</P><P></P><P>So it is not possible to use 8MHz HFO in STOP modes. STOP4 mode is used by several firmware functions (refer to the Firmware User Guide). And STOP1 mode is necessary for power saving considerations.</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="image001.jpg"><img src="https://community.nxp.com/t5/image/serverpage/image-id/57575i615ECA2352FC0DDB/image-size/large?v=v2&amp;px=999" role="button" title="image001.jpg" alt="image001.jpg" /></span></P><P></P><P>Regards,</P><P>Tomas</P><P></P><P><EM style="font-size: 11px; font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">PS: If my answer helps to solve your question, please mark it as "Correct". Thank you.</EM></P></BODY></HTML> Thu, 12 May 2016 19:45:17 GMT TomasVaverka 2016-05-12T19:45:17Z Fxth87 internal oscilator https://community.nxp.com/t5/Sensors/Fxth87-internal-oscilator/m-p/511590#M3229 <HTML><HEAD></HEAD><BODY><P>Hi all,</P><P>Can I drive <A href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.freescale.com%2Fwebapp%2Fsps%2Fsite%2Fprod_summary.jsp%3Fcode%3DFXTH87" target="_blank">FXTH87</A>​​​ just on internal 8Mhz oscilator if LF and RF is not in use? ( BLE will be used for comunication instead of LF and RF).</P><P>Thnx</P><P>A</P></BODY></HTML> Tue, 03 Feb 2026 21:20:16 GMT https://community.nxp.com/t5/Sensors/Fxth87-internal-oscilator/m-p/511590#M3229 alesgabersek 2026-02-03T21:20:16Z Re: Fxth87 internal oscilator https://community.nxp.com/t5/Sensors/Fxth87-internal-oscilator/m-p/511591#M3230 <HTML><HEAD></HEAD><BODY><P>Hi Ales,</P><P></P><P>8MHz is provided by the HFO clock and this clock is off in STOP modes.</P><P></P><P>So it is not possible to use 8MHz HFO in STOP modes. STOP4 mode is used by several firmware functions (refer to the Firmware User Guide). And STOP1 mode is necessary for power saving considerations.</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="image001.jpg"><img src="https://community.nxp.com/t5/image/serverpage/image-id/57575i615ECA2352FC0DDB/image-size/large?v=v2&amp;px=999" role="button" title="image001.jpg" alt="image001.jpg" /></span></P><P></P><P>Regards,</P><P>Tomas</P><P></P><P><EM style="font-size: 11px; font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">PS: If my answer helps to solve your question, please mark it as "Correct". Thank you.</EM></P></BODY></HTML> Thu, 12 May 2016 19:45:17 GMT https://community.nxp.com/t5/Sensors/Fxth87-internal-oscilator/m-p/511591#M3230 TomasVaverka 2016-05-12T19:45:17Z