topic LPC1857 MII and SD Card in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-MII-and-SD-Card/m-p/531997#M10331 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by REO on Wed Feb 18 09:03:41 MST 2015</STRONG><BR /><SPAN>Hi all</SPAN><BR /><BR /><SPAN>I'm currently designing an application with the LPC1857 uC.</SPAN><BR /><BR /><SPAN>I need both Ethernet and a SD card reader, but since the PHY we have on stock roght now only support MII I have a problem.</SPAN><BR /><SPAN>It turns out that MII signal "RX_CLK" is shared with SD card signal "SD_CLK" on PC_0 (pin D4 on 256 pin BGA)</SPAN><BR /><BR /><SPAN>Is there any kind of work around for this? Or is my only option to find a PHY that supports RMII?</SPAN><BR /><BR /><SPAN>Regards Rasmus</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:18:44 GMT lpcware 2016-06-15T18:18:44Z LPC1857 MII and SD Card https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-MII-and-SD-Card/m-p/531997#M10331 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by REO on Wed Feb 18 09:03:41 MST 2015</STRONG><BR /><SPAN>Hi all</SPAN><BR /><BR /><SPAN>I'm currently designing an application with the LPC1857 uC.</SPAN><BR /><BR /><SPAN>I need both Ethernet and a SD card reader, but since the PHY we have on stock roght now only support MII I have a problem.</SPAN><BR /><SPAN>It turns out that MII signal "RX_CLK" is shared with SD card signal "SD_CLK" on PC_0 (pin D4 on 256 pin BGA)</SPAN><BR /><BR /><SPAN>Is there any kind of work around for this? Or is my only option to find a PHY that supports RMII?</SPAN><BR /><BR /><SPAN>Regards Rasmus</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:18:44 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-MII-and-SD-Card/m-p/531997#M10331 lpcware 2016-06-15T18:18:44Z Re: LPC1857 MII and SD Card https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-MII-and-SD-Card/m-p/531998#M10332 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by bavarian on Tue Mar 17 04:54:10 MST 2015</STRONG><BR /><SPAN>Yes, this is the only option. Use a PHY which supports RMII. </SPAN><BR /><SPAN>Using MII and the SD Card interface is not possible due to this pin conflict.</SPAN><BR /><BR /><SPAN>Regards,</SPAN><BR /><SPAN>NXP Support Team </SPAN></BODY></HTML> Wed, 15 Jun 2016 18:18:45 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1857-MII-and-SD-Card/m-p/531998#M10332 lpcware 2016-06-15T18:18:45Z