Kinetis MicrocontrollersのトピックLoss of Clock reset when waking from stop mode https://community.nxp.com/t5/Kinetis-Microcontrollers/Loss-of-Clock-reset-when-waking-from-stop-mode/m-p/157210#M457 <HTML><HEAD></HEAD><BODY><P>I wanted to point this out after working on an issue.&nbsp; The snippet from the reference manual below shows the MCG clock monitor needs to be disabled when entering any stop mode, VLPR, or VLPW.&nbsp; This is done by clearing the CME bit in MCG_C6.&nbsp; If CME is set when entering a low power mode, it can cause resets.&nbsp; As of MQX v3.8.1, some BSPs do have the CME bit set when entering a low power mode.&nbsp; This issue has already been reported to the MQX team.</P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/118951i800DD812F071BAE0/image-size/large?v=v2&amp;px=999" title="Snippet.jpg" alt="Snippet.jpg" /></span></P></BODY></HTML> Mon, 29 Oct 2012 20:57:41 GMT dereksnell 2012-10-29T20:57:41Z Loss of Clock reset when waking from stop mode https://community.nxp.com/t5/Kinetis-Microcontrollers/Loss-of-Clock-reset-when-waking-from-stop-mode/m-p/157210#M457 <HTML><HEAD></HEAD><BODY><P>I wanted to point this out after working on an issue.&nbsp; The snippet from the reference manual below shows the MCG clock monitor needs to be disabled when entering any stop mode, VLPR, or VLPW.&nbsp; This is done by clearing the CME bit in MCG_C6.&nbsp; If CME is set when entering a low power mode, it can cause resets.&nbsp; As of MQX v3.8.1, some BSPs do have the CME bit set when entering a low power mode.&nbsp; This issue has already been reported to the MQX team.</P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/118951i800DD812F071BAE0/image-size/large?v=v2&amp;px=999" title="Snippet.jpg" alt="Snippet.jpg" /></span></P></BODY></HTML> Mon, 29 Oct 2012 20:57:41 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Loss-of-Clock-reset-when-waking-from-stop-mode/m-p/157210#M457 dereksnell 2012-10-29T20:57:41Z