topic LPO Frequency deviation - RTC scalling | S32K146 in S32K https://community.nxp.com/t5/S32K/LPO-Frequency-deviation-RTC-scalling-S32K146/m-p/877868#M4008 <HTML><HEAD></HEAD><BODY><P>Hi all,</P><P></P><P>I have question regarding LPO frequency in S32K146, I couldn't find any details about thermal compensation and frequency deviation during run-time.</P><P>I'm obligated to use LPO oscillator in RTC&nbsp;unite - it's only way during VLPS(without external oscillator 32, 768 kHz).</P><P>In case of big frequency fault (~10%) I will use LPO trimming but I want to know - <STRONG>how the system works&nbsp;while temperature changes</STRONG>.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/68972i6E3F0F737D66921F/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>Another question is the best practices during automatic RTC scaling before entering LPO mode, if you have any working way, please share it.</P><P></P><P>Thank you in advance, Jan</P></BODY></HTML> Thu, 21 Mar 2019 10:26:32 GMT jan_glos 2019-03-21T10:26:32Z LPO Frequency deviation - RTC scalling | S32K146 https://community.nxp.com/t5/S32K/LPO-Frequency-deviation-RTC-scalling-S32K146/m-p/877868#M4008 <HTML><HEAD></HEAD><BODY><P>Hi all,</P><P></P><P>I have question regarding LPO frequency in S32K146, I couldn't find any details about thermal compensation and frequency deviation during run-time.</P><P>I'm obligated to use LPO oscillator in RTC&nbsp;unite - it's only way during VLPS(without external oscillator 32, 768 kHz).</P><P>In case of big frequency fault (~10%) I will use LPO trimming but I want to know - <STRONG>how the system works&nbsp;while temperature changes</STRONG>.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/68972i6E3F0F737D66921F/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>Another question is the best practices during automatic RTC scaling before entering LPO mode, if you have any working way, please share it.</P><P></P><P>Thank you in advance, Jan</P></BODY></HTML> Thu, 21 Mar 2019 10:26:32 GMT https://community.nxp.com/t5/S32K/LPO-Frequency-deviation-RTC-scalling-S32K146/m-p/877868#M4008 jan_glos 2019-03-21T10:26:32Z