https://community.nxp.com/t5/Layerscape/LS1012A-eSDHC-Pull-up/m-p/1232344#M7545 <P>Does the "Pull up" column in Table 18-4 of the reference manual (LS1012ARM) indicate that the LS1012A has internal pull-ups on these signals or does it indicate that external pull-ups are required?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="jaredl_0-1613596597912.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/137379iD6A3578970F1E9E3/image-size/medium?v=v2&amp;px=400" role="button" title="jaredl_0-1613596597912.png" alt="jaredl_0-1613596597912.png" /></span></P><P>&nbsp;</P> Wed, 17 Feb 2021 21:17:20 GMT jaredl 2021-02-17T21:17:20Z https://community.nxp.com/t5/Layerscape/LS1012A-eSDHC-Pull-up/m-p/1232344#M7545 <P>Does the "Pull up" column in Table 18-4 of the reference manual (LS1012ARM) indicate that the LS1012A has internal pull-ups on these signals or does it indicate that external pull-ups are required?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="jaredl_0-1613596597912.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/137379iD6A3578970F1E9E3/image-size/medium?v=v2&amp;px=400" role="button" title="jaredl_0-1613596597912.png" alt="jaredl_0-1613596597912.png" /></span></P><P>&nbsp;</P> Wed, 17 Feb 2021 21:17:20 GMT https://community.nxp.com/t5/Layerscape/LS1012A-eSDHC-Pull-up/m-p/1232344#M7545 jaredl 2021-02-17T21:17:20Z https://community.nxp.com/t5/Layerscape/LS1012A-eSDHC-Pull-up/m-p/1232682#M7547 <DIV><FONT face="Arial, sans-serif" size="2">According to the LS1012A Datasheet,&nbsp;Table 1. Pinout list by bus, notes 28,29</FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2"><A href="https://www.nxp.com/webapp/Download?colCode=LS1012A" target="_blank" rel="noopener">https://www.nxp.com/webapp/Download?colCode=LS1012A</A></FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2">&nbsp;</FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2">and&nbsp;</FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2">&nbsp;</FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2">LS1012A Design checklist,&nbsp;5.4.1 eSDHC pin termination recommendations</FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2"><A href="https://www.nxp.com/webapp/Download?colCode=AN5192" target="_blank" rel="noopener">https://www.nxp.com/webapp/Download?colCode=AN5192</A></FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2">&nbsp;</FONT></DIV> <DIV><FONT face="Arial, sans-serif" size="2">SDHCx_CMD and&nbsp;SDHCx_DAT[0:3]&nbsp;pins should be pulled high through a 10-20 kΩ resistor to EVDD.</FONT></DIV> Thu, 18 Feb 2021 08:41:57 GMT https://community.nxp.com/t5/Layerscape/LS1012A-eSDHC-Pull-up/m-p/1232682#M7547 andrei_skok 2021-02-18T08:41:57Z