Replace the GHRD SD MMC to be a smaller EMMC chip?

[Altera_Forum]

Hi, Any precaution for us to replace the current SD MMC slot to another eMMC slot? is the communication is compatible all the way?

[Altera_Forum]

if read from the hand book bot protocol looks compatible....

[Altera_Forum]

Yes, eMMC this is a compatible protocol with SD MMC,

[Altera_Forum]

take note that when follow the golden reference, the SD MMC configuration is in 4 bit data, where not fully utilize all the 8 bit data mode...

[Altera_Forum]

how is the physical connection? it is compatible between emmc and sd card?

[Altera_Forum]

yes... that's right... it is compatible.

[Altera_Forum]

Hey the boot time of the soc guide for sd cars is using the golden design? That is not with maximum 8 bit data. Only 4 bit. Could it becomes even shorter boot with 8 bit?

[Altera_Forum]

definitely yes...with maximum supported data width.

[Altera_Forum]

there fore you are good to use any emmc type as long as supported by the controller