16-bit sdram and 32-bit opb bus

[Frank]

Is it possible to use the opb sdram controller with a 32-bits opb bus to a
microblaze one side and a 16-bits sdram to the other side? What if I do a
32-bits access to sdram. Will the controller convert this automatically in
two 16-bits cycles? The datasheet of the opb sdram controller says: "Since
the sdram will always be accessed to provide data the width of the OPB bus,
....". So it looks like it will convert a 32-bits access to two 16-bits
accesses, but can anyone acknowledge this?

Frank

 

[Anita Schreiber]

Hello Frank,

You are exactly right - the OPB SDRAM controller will convert the 32-bit access
on the OPB bus to two 16-bit accesses to the SDRAM. (it actually looks like a
SDRAM burst of 2).

Thanks!
anita

Frank wrote:

Is it possible to use the opb sdram controller with a 32-bits opb bus to a
microblaze one side and a 16-bits sdram to the other side? What if I do a
32-bits access to sdram. Will the controller convert this automatically in
two 16-bits cycles? The datasheet of the opb sdram controller says: "Since
the sdram will always be accessed to provide data the width of the OPB bus,
...". So it looks like it will convert a 32-bits access to two 16-bits
accesses, but can anyone acknowledge this?

Frank