i.MX Processorsのトピックi.MX8m Mini EVK USB1 vs USB2 https://community.nxp.com/t5/i-MX-Processors/i-MX8m-Mini-EVK-USB1-vs-USB2/m-p/922034#M138615 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>On the <A href="https://www.nxp.com/support/developer-resources/evaluation-and-development-boards/i.mx-evaluation-and-development-boards/evaluation-kit-for-thebr-i.mx-8m-mini-applications-processor:8MMINILPD4-EVK">i.MX8m mini evk</A>, USB1 (J301) is the download port while USB2 (J302) is the power supply port. Looking at the schematic (Page 6), both USB1 and USB2 appear to have similar design except, on USB1, EN_SNK1 (U303) is not directly connected to 3483_EN_SNK1(U302). It goes through this circuit:</P><P></P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/84112i589C7577F42CCE47/image-size/large?v=v2&amp;px=999" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P></P><P>On our application, we only need USB1 to download firmware and we are doing something else for power.&nbsp;</P><P></P><P>1)&nbsp;Are&nbsp;<SPAN>EN_SNK1 (U303) and&nbsp;3483_EN_SNK1(U302) the only thing from preventing USB1 from acting as power supply port?</SPAN></P><P></P><P><SPAN>2) If we just need USB1 for downloading firmware, can I just leave EN_SNK1 (U303) and&nbsp;<SPAN>3483_EN_SNK1(U302) pins open?</SPAN></SPAN></P><P><SPAN></SPAN></P><P><SPAN><SPAN>Thank you,<BR />Faiz</SPAN></SPAN></P></BODY></HTML> Wed, 29 May 2019 15:59:47 GMT faiz 2019-05-29T15:59:47Z i.MX8m Mini EVK USB1 vs USB2 https://community.nxp.com/t5/i-MX-Processors/i-MX8m-Mini-EVK-USB1-vs-USB2/m-p/922034#M138615 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>On the <A href="https://www.nxp.com/support/developer-resources/evaluation-and-development-boards/i.mx-evaluation-and-development-boards/evaluation-kit-for-thebr-i.mx-8m-mini-applications-processor:8MMINILPD4-EVK">i.MX8m mini evk</A>, USB1 (J301) is the download port while USB2 (J302) is the power supply port. Looking at the schematic (Page 6), both USB1 and USB2 appear to have similar design except, on USB1, EN_SNK1 (U303) is not directly connected to 3483_EN_SNK1(U302). It goes through this circuit:</P><P></P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/84112i589C7577F42CCE47/image-size/large?v=v2&amp;px=999" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P></P><P>On our application, we only need USB1 to download firmware and we are doing something else for power.&nbsp;</P><P></P><P>1)&nbsp;Are&nbsp;<SPAN>EN_SNK1 (U303) and&nbsp;3483_EN_SNK1(U302) the only thing from preventing USB1 from acting as power supply port?</SPAN></P><P></P><P><SPAN>2) If we just need USB1 for downloading firmware, can I just leave EN_SNK1 (U303) and&nbsp;<SPAN>3483_EN_SNK1(U302) pins open?</SPAN></SPAN></P><P><SPAN></SPAN></P><P><SPAN><SPAN>Thank you,<BR />Faiz</SPAN></SPAN></P></BODY></HTML> Wed, 29 May 2019 15:59:47 GMT https://community.nxp.com/t5/i-MX-Processors/i-MX8m-Mini-EVK-USB1-vs-USB2/m-p/922034#M138615 faiz 2019-05-29T15:59:47Z Re: i.MX8m Mini EVK USB1 vs USB2 https://community.nxp.com/t5/i-MX-Processors/i-MX8m-Mini-EVK-USB1-vs-USB2/m-p/922035#M138616 <HTML><HEAD></HEAD><BODY><P>Q. Are EN_SNK1 (U303) and 3483_EN_SNK1(U302) the only thing from preventing USB1 from acting as power supply port?</P><P></P><P>A. Yes.</P><P></P><P>Q. If we just need USB1 for downloading firmware, can I just leave EN_SNK1 (U303) and 3483_EN_SNK1(U302) pins open?</P><P></P><P>A. You can leave EN_SNK1 (U303) open and tie 3483_EN_SNK1(U302) to GND.</P><P></P><P>Have a great day,</P><P>Artur</P></BODY></HTML> Fri, 31 May 2019 09:22:07 GMT https://community.nxp.com/t5/i-MX-Processors/i-MX8m-Mini-EVK-USB1-vs-USB2/m-p/922035#M138616 art 2019-05-31T09:22:07Z