Using LPC18xx in LQFP208 Package causes problems with EMC_WE and SD_CMD

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by Martin84 on Tue Jul 30 02:07:15 MST 2013
Hi everybody,

I wanna use the EMC and the SD/MMC Interface with an LPC1857 in LQFP208 Package. Now I have the problem that the EMC_WE: Write enable and SD_CMD: command input/output functions are placed on the same pin. There is no alternative with this package.

How can I solve the problem without changing to LBGA256? Can I drive one of these functions with a GPIO (I mean without using the hardware function of the pin)? Perhaps the SD_CMD?

Or is there no possibility, so I have to switch to another external memory instead of sd card?