C6747: Can one use EMIFB to Connect SRAM instead of SDRAM?

Raymond Franzen

Is there a way to connect the EMIFB to an ASYNCHRONOUS SRAM, instead of an SDRAM?

0 jc-ti over 15 years ago

No, EMIFB is only for synchronous memories.

Jeff

[fixed typo]

0 Traian Mitrache over 15 years ago in reply to jc-ti

Well...that was the original question : can it be used to connect to ASYNCHRONOUS memories?

Did u mistype? Did u mean "EMIFB is only for SYNCHRONOUS" memories?

0 tlee over 15 years ago in reply to Traian Mitrache

I think that was a typo. EMIFA is for Async or SDRAM. EMIFB is for SDRAM only.

0 Raymond Franzen over 15 years ago in reply to jc-ti

Jeff,

Attached is a block dagram of what we want to do. What would you recommend is the best way to connect a C674x DSP to a Xilinx Spartan-6 FPGA?

0 pradhyum over 15 years ago in reply to Raymond Franzen

Traian/Ray:

On 6748 you can use Upp. On 6747 you can use EMIFB to interface to FPGA.

Xilinx has an app note to interface older processors (671x, 64x) to EMIF

Question for factory experts..

Are there any gotchas using this reference with a 674x EMIFB ?. Is there a newer FPGA-EMIF connection collateral available ?

Thanks,

Pradhyum

0 tlee over 15 years ago in reply to pradhyum

Pradhyum,

If possible, I would recommend using EMIFA asynch mode to interface with the FPGA. The SDRAM interface is a lot more difficult to handle.

This was a discussion on EMIFA-SDRAM mode to FPGA which turned into a fairly confusing debug effort. The lessons learned on EMIFA-SDRAM may not apply directly to EMIFB-SDRAM: http://e2e.ti.com/support/arm174_microprocessors/omap_applications_processors/f/42/p/34528/120224.aspx#120224

-Tommy

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