AM1808 DDR2 Memory Controller's maximum frequency ?

robert chen97444 said:

Does AM1808's memory controller have a maximum frequency or frequency limitation ?

Is it 150 MHz ?

Yes, there is a maximum frequency.  It is dependent on the core voltage as indicated in Table 5-23 of the AM1808 datasheet.

robert chen97444 said:

(There is a related sentence mentioned in SPRUH82A.pdf , page 127. But it may just an example...)

We use 128MB DDR2-800 in our design. Will it be limited to that speed?

The limit will be on the AM1808 DDR2 controller maximum frequency of 150MHz.