DDR2 Read-Write-Read-Write Example

Hello, thanks for responding to my post. I have another question and it relates to the signal "local_size". I am using a PCIe card that has some DDR2 SDRAM installed. I hope to do a DMA to the card into an FIFO on the fpga and then read the fifo and write the data to the SDRAM. The amount of data could be large, say a 512by512 32 bit image. In that case would I have any problem setting the local_size signal to be 1?

On page 3-25 it has a note for DDR2 device with the local_size signal. It says,

"The concept if similiar for DDR2 SDRAM althought only burst lengths 1 and 2 (2 and 4 on the DDR2 SDRAM side) are available."

I'm confused, does that mean the size choices are only 1 and 2 for the signal local_size?