OMAP-L138 EMIFA CS2-CS5, every CSn addressable space is 32Mbyte, but address A0-A23 add BA0,BA1, total address line is 26 pin, it should can address upto 64Mbyte space, in fact ,it is not supported, so I think A23 is not useful.
And from AM1808 datasheet, A23 is not available anymore, seems it is recongnized as redundant. If so, I think it should be deleted from OMAP-L138 datasheet also.
