lpcware

LPC1857 MII and SD Card

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by REO on Wed Feb 18 09:03:41 MST 2015
Hi all

I'm currently designing an application with the LPC1857 uC.

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.
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)

Is there any kind of work around for this? Or is my only option to find a PHY that supports RMII?

Regards Rasmus

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