The NS7520 documentation indicates that 32-bit wide SDRAM databusses are usually constructed with 2 chips rather than 1. Is there a technical reason for this other than possibly the availability of parts? I am having difficulty using the Micron MT48LC4M32B2, their generic 3.3V, 32-bit wide part. Any suggestions?

Hi Paul, I am using the same Micron SDRAM on my NS7520 design. I did have some problems with a 2Mx32 part from Micron, but I was missing an appnote on how to appoint the upper address signals when using a 64Mbit SDRAM. We are running with uCLinux. What OS are you using?