i.MX Processors中的主题 About SD Card Power Down https://community.nxp.com/t5/i-MX-Processors/About-SD-Card-Power-Down/m-p/1057317#M155511 <HTML><HEAD></HEAD><BODY><P><SPAN style="color: #51626f; background-color: #ffffff;">Hello,Community</SPAN></P><P></P><P>As shown below, at power down, CLK, CMD and DATA must be logic 0.</P><P>For example, if you use SW_MUX_CTL_Register(IOMUXC_SW_MUX_CTL_PAD_SD1_CLK) for ALT0_SD1_CLK and use it as a clock, do you have to perform the following processing at power down?</P><P>Or can the program force a logical 0 to be output?</P><P></P><P>1.Change the allocation to 100kPD(IOMUXC_SW_PAD_CTL_PAD_SD1_CLK).<BR />2. Change the allocation to ALT5_GPIO5_IO3(IOMUXC_SW_MUX_CTL_PAD_SD1_CLK).<BR />3. Assign to input with GPIOx_GDIR.</P><P></P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/109458i08EED43DC3C9856C/image-size/large?v=v2&amp;px=999" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P></P><P style="border: 0px;"><SPAN style="border: 0px; font-weight: inherit;">best regards</SPAN></P><P style="border: 0px;"><SPAN style="border: 0px; font-weight: inherit;">Goto</SPAN></P></BODY></HTML> Tue, 04 Aug 2020 06:04:39 GMT goto11 2020-08-04T06:04:39Z About SD Card Power Down https://community.nxp.com/t5/i-MX-Processors/About-SD-Card-Power-Down/m-p/1057317#M155511 <HTML><HEAD></HEAD><BODY><P><SPAN style="color: #51626f; background-color: #ffffff;">Hello,Community</SPAN></P><P></P><P>As shown below, at power down, CLK, CMD and DATA must be logic 0.</P><P>For example, if you use SW_MUX_CTL_Register(IOMUXC_SW_MUX_CTL_PAD_SD1_CLK) for ALT0_SD1_CLK and use it as a clock, do you have to perform the following processing at power down?</P><P>Or can the program force a logical 0 to be output?</P><P></P><P>1.Change the allocation to 100kPD(IOMUXC_SW_PAD_CTL_PAD_SD1_CLK).<BR />2. Change the allocation to ALT5_GPIO5_IO3(IOMUXC_SW_MUX_CTL_PAD_SD1_CLK).<BR />3. Assign to input with GPIOx_GDIR.</P><P></P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/109458i08EED43DC3C9856C/image-size/large?v=v2&amp;px=999" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P></P><P style="border: 0px;"><SPAN style="border: 0px; font-weight: inherit;">best regards</SPAN></P><P style="border: 0px;"><SPAN style="border: 0px; font-weight: inherit;">Goto</SPAN></P></BODY></HTML> Tue, 04 Aug 2020 06:04:39 GMT https://community.nxp.com/t5/i-MX-Processors/About-SD-Card-Power-Down/m-p/1057317#M155511 goto11 2020-08-04T06:04:39Z Re: About SD Card Power Down https://community.nxp.com/t5/i-MX-Processors/About-SD-Card-Power-Down/m-p/1057318#M155512 <HTML><HEAD></HEAD><BODY><P>Hi GoTo</P><P></P><P><SPAN style="color: #51626f; background-color: #ffffff;"><SPAN>you are right, one can&nbsp;</SPAN>force signals to logical 0 in software</SPAN></P><P><SPAN style="color: #51626f; background-color: #ffffff;">using your sequence.</SPAN></P><P><SPAN style="color: #51626f; background-color: #ffffff;"><BR />Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</SPAN></P></BODY></HTML> Tue, 04 Aug 2020 11:05:27 GMT https://community.nxp.com/t5/i-MX-Processors/About-SD-Card-Power-Down/m-p/1057318#M155512 igorpadykov 2020-08-04T11:05:27Z