Why Two SDRAM in AT91RM9200dk used

Hi All,

I am working on a prototype board based on at91rm9200dk.now i have place only one SDRAM (16 MB)on my board.I am able to access the sdram and flas successfully but now after storing the gzip image u-boot.gz in flash whe the board get reboot from external flash, it got hanged at

Uncompressing Image...

I thing it is trying to uncompress the image at the location above 16MB. So since i have only one SDRAM on board wht changes i have to make in m code and hardware.

Also plz tell me about the controller pins CFIOW and CFIOR , how they wor

Thanks in anticipation,

Pratik