MicroBlaze in Spartan3, external memory interface

[MM]

Hi all,

Does anyone have any experience in interfacing SDRAM, SBSRAM and FLASH to
MicroBlaze in Spartan-3? I am somewhat confused with the number of various
memory controllers mentioned on the EDK web pages, albeit many of them don't
name Spartan-3 amongst their target technologies... Can this be done with
just Logicores?


Thanks,
/Mikhail

 

[Shalin Sheth]

Mikhail,

When interfacing external memories with Microblaze you want to use the
memory controllers includes in the Embedded Development Kit (EDK) and
not the Logicores.

For the SDRAM interface you want to use the OPB_SDRAM controller.
For the SBSRAM interface you want to use the OPB_EMC controller.
For the FLASH interface you want to use the OPB_EMC controller.

Both of these cores are supported for Spartan-3 in the latest EDK 6.2
service pack 2 release.

Shalin-


MM wrote:

Hi all,

Does anyone have any experience in interfacing SDRAM, SBSRAM and FLASH to
MicroBlaze in Spartan-3? I am somewhat confused with the number of various
memory controllers mentioned on the EDK web pages, albeit many of them don't
name Spartan-3 amongst their target technologies... Can this be done with
just Logicores?


Thanks,
/Mikhail

 

[MM]

Thanks Shalin. Do you have by any chance a practical example of a similar
memory configuration showing how to multiplex the control pins of the 2
controllers? I am in the board level design stage with this project and I
need to define the FPGA pinout before plunging deep into studying the cores.

/Mikhail


"Shalin Sheth" <Shalin.Sheth@xilinx.com> wrote in message
news:40F3D34E.6020706@xilinx.com...

Mikhail,

When interfacing external memories with Microblaze you want to use the
memory controllers includes in the Embedded Development Kit (EDK) and
not the Logicores.

For the SDRAM interface you want to use the OPB_SDRAM controller.
For the SBSRAM interface you want to use the OPB_EMC controller.
For the FLASH interface you want to use the OPB_EMC controller.

Both of these cores are supported for Spartan-3 in the latest EDK 6.2
service pack 2 release.

Shalin-