how to choose the emmc for LS1043A

[manid]

Hi

we are developing the LS1043A processor. and booting option is eMMC . 

LS1043A support eMMC up to rev 4.4/4.5, but eMMC 4.4 and 4.5 has been discontinued and some 4.4 and 4.5 eMMC component  is obsolete. If I should use the 5.0 or upper version eMMC, on what basis I can select high version of eMMC?

if i select the higher version how to use the data strobe pin?

[manid]

is LS1043 support HS200 mode with 4 bit mode?? 

[Pavel · Accepted solution]

The LS1043a eSDHC can use this eMMC, since eMMC devices version 5.0 and higher are backward compatible to previous versions.

[manid]

HI

The latest emmc ver 5.0 and 5.1 have data strobe and reset pin. but LS1043A don't have these pin. how configure these pin??

[Pavel]

The Data strobe signal is used in HS400mode. The LS1043a does not support this mode.

There is internal pull-up on reset in eMMC ver 5.0 and 5.1.

It is not necessary to put pull-up resistance on RST_n (H/W rest) line if host does not use H/W reset. 

[manid]

is LS1043A support HS200 mode??

[Pavel]

Yes, the LS1043a eSDHC supports HS200 mode. See the Section 22.1.1 in the LS1043a Reference Manual.