lpcware

LPC1788 and SD-RAM Micron MT48LC4M32B2P-6A IT not compatible?

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by Herrbert on Tue Nov 24 05:12:44 MST 2015
Hi Forum,

I have a problem with the timing specification of the EMC of LPC1788.

The SD-RAM we use (Micron MT48LC4M32B2P-6A IT) specifies a data hold time of min. 3 ns.

This seems to not be compatible with the LPC1788 EMCs specification of a data input hold time (th) of min. (FBCLKDLY+1) * 0.25 +3.7 ns (so minimal 3.95 ns).

The primecell documentation of the EMC (IMHO this is PL172) explicitly says that the RAM is compatible.

Is there an error in the datasheet? Do I miss something?

Thanks!

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