topic Re: imx7d power up sequence issue in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/imx7d-power-up-sequence-issue/m-p/778926#M121010 <HTML><HEAD></HEAD><BODY><P>There is nothing abnormal here. The small initial voltage on the VLDO3V3 power rail is most likely caused by some current back leakage somewhere in the hardware. It should not affect the hardware functionality.</P><P><BR />Have a great day,<BR />Artur</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 15 Jan 2018 07:44:31 GMT art 2018-01-15T07:44:31Z imx7d power up sequence issue https://community.nxp.com/t5/i-MX-Processors/imx7d-power-up-sequence-issue/m-p/778925#M121009 <HTML><HEAD></HEAD><BODY><P>Hi All</P><P></P><P>Platform: i.MX7D with PF3000</P><P>Software: Linux 4.1.15.2.0.0</P><P></P><P>When power up the VLDO3V3 will have abnormal signal then pull high, why reason will bring abnormal signal?</P><P>How to fixed abnormal signal?</P><P></P><P>Thanks.</P><P></P><P>i.MX7D EVB</P><P><span class="lia-inline-image-display-wrapper" image-alt="power up nxp evb.jpg"><img src="https://community.nxp.com/t5/image/serverpage/image-id/2426i408B5B3FDC1C111D/image-size/large?v=v2&amp;px=999" role="button" title="power up nxp evb.jpg" alt="power up nxp evb.jpg" /></span></P><P></P><P>Customer board</P><P><span class="lia-inline-image-display-wrapper" image-alt="power up svh.jpg"><img src="https://community.nxp.com/t5/image/serverpage/image-id/2493i091BEA1C0B1A7E8F/image-size/large?v=v2&amp;px=999" role="button" title="power up svh.jpg" alt="power up svh.jpg" /></span></P></BODY></HTML> Thu, 11 Jan 2018 06:34:52 GMT https://community.nxp.com/t5/i-MX-Processors/imx7d-power-up-sequence-issue/m-p/778925#M121009 felixhsu 2018-01-11T06:34:52Z Re: imx7d power up sequence issue https://community.nxp.com/t5/i-MX-Processors/imx7d-power-up-sequence-issue/m-p/778926#M121010 <HTML><HEAD></HEAD><BODY><P>There is nothing abnormal here. The small initial voltage on the VLDO3V3 power rail is most likely caused by some current back leakage somewhere in the hardware. It should not affect the hardware functionality.</P><P><BR />Have a great day,<BR />Artur</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Mon, 15 Jan 2018 07:44:31 GMT https://community.nxp.com/t5/i-MX-Processors/imx7d-power-up-sequence-issue/m-p/778926#M121010 art 2018-01-15T07:44:31Z