topic Re: Shutting down the Cortex M4 core on the iMX7d processor in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/Shutting-down-the-Cortex-M4-core-on-the-iMX7d-processor/m-p/987154#M146593 <HTML><HEAD></HEAD><BODY><P>good!</P></BODY></HTML> Wed, 22 Jan 2020 13:42:49 GMT Bio_TICFSL 2020-01-22T13:42:49Z Shutting down the Cortex M4 core on the iMX7d processor https://community.nxp.com/t5/i-MX-Processors/Shutting-down-the-Cortex-M4-core-on-the-iMX7d-processor/m-p/987152#M146591 <HTML><HEAD></HEAD><BODY><P>Our device is currently not utilizing the Cortex M4 core on the i.MX7d processor. Is there any means (GPIO, SMBus,etc.) to power off the Cortex M4 core?</P></BODY></HTML> Tue, 21 Jan 2020 15:43:45 GMT https://community.nxp.com/t5/i-MX-Processors/Shutting-down-the-Cortex-M4-core-on-the-iMX7d-processor/m-p/987152#M146591 cnapolitano 2020-01-21T15:43:45Z Re: Shutting down the Cortex M4 core on the iMX7d processor https://community.nxp.com/t5/i-MX-Processors/Shutting-down-the-Cortex-M4-core-on-the-iMX7d-processor/m-p/987153#M146592 <HTML><HEAD></HEAD><BODY><P>Hi&nbsp;<A _jive_internal="true" data-content-finding="Community" data-userid="354474" data-username="cnapolitano@zoll.com" href="https://community.nxp.com/people/cnapolitano@zoll.com" style="color: #3d9ce7; background-color: #ffffff; border: 0px; font-weight: 600; text-decoration: underline; font-size: 11.9994px;">Cameron Napolitano</A>,</P><P></P><P>As mentioned in the i.MX7D RM <STRONG>section 4.2.5 Cortex-M4 Boot requirement</STRONG>, Cortex-A7 is responsible for enabling and providing clock to Cortex-M4, please see the image below:</P><P><span class="lia-inline-image-display-wrapper" image-alt="Screenshot from 2020-01-22 12-23-35.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/98719i02AAA96754FBE016/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot from 2020-01-22 12-23-35.png" alt="Screenshot from 2020-01-22 12-23-35.png" /></span></P><P>Taking clue from the last point, using the&nbsp;<STRONG>SRC_M4RCR</STRONG>(M4 Reset Control Register) register's 3rd bit (ENABLE_M4) we can enable/disable M4.</P><P></P><P>Regards,</P><P>Karan Gajjar</P></BODY></HTML> Wed, 22 Jan 2020 07:00:41 GMT https://community.nxp.com/t5/i-MX-Processors/Shutting-down-the-Cortex-M4-core-on-the-iMX7d-processor/m-p/987153#M146592 karangajjar 2020-01-22T07:00:41Z Re: Shutting down the Cortex M4 core on the iMX7d processor https://community.nxp.com/t5/i-MX-Processors/Shutting-down-the-Cortex-M4-core-on-the-iMX7d-processor/m-p/987154#M146593 <HTML><HEAD></HEAD><BODY><P>good!</P></BODY></HTML> Wed, 22 Jan 2020 13:42:49 GMT https://community.nxp.com/t5/i-MX-Processors/Shutting-down-the-Cortex-M4-core-on-the-iMX7d-processor/m-p/987154#M146593 Bio_TICFSL 2020-01-22T13:42:49Z