since I believe DDR2 with 4Gb size is a twin die and has common strobe/mask signals and different CS. As a side note, in "am3359.pdf" document there is a functional block diagram on page 5 and the ...

FTADDR is a memory controller for DDR2 and DDR3 SDRAM memory devices. It uses a strong error correction code to achieve exceptional fault tolerance. On the memory ...

The emerging DDR3 memory standard will extend the performance range of DDR memories considerably, while maintaining some amount of backwards compatibility with the existing DDR2 memory standard. It is ...