Microblaze opb_emc

[Barron Barnett]

I am currently working with a digilent pegasus board and trying to
connect wtih their Ram module using the OPB_emc. The problem is I am not
really sure where to start, I have the data sheets and shcematics for the
ram and boards. But i am confused on how the external memory controller
itself will deat with the ram. Any good tutorials you can point me towards
doing this would be very helpful.

Thank you,
Barron Barnett, barnettb@u.washington.**NOSPAM**.edu

 

[John Williams]

Hi Barron,

Barron Barnett wrote:

I am currently working with a digilent pegasus board and trying to
connect wtih their Ram module using the OPB_emc. The problem is I am not
really sure where to start, I have the data sheets and shcematics for the
ram and boards. But i am confused on how the external memory controller
itself will deat with the ram. Any good tutorials you can point me towards
doing this would be very helpful.

First I'd ask your Digilent FAE. They should have a suite of reference
designs that exercise the various hardware resources on each board.

Secondly the emc controller is not a particular complicated beast - you
basically need to translate the timing requirements of your SRAM into
the various timing parameters specified to the emc controller. The emc
data sheet also has extensive discussion about mapping the signals, in
terms of physical memory width vs logical (bus) width and so on.

If you are still stuck, post some details about the SRAM devices and how
they are connected to the FPGA, we might be able to provide some pointers.

Regards,

John