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Altera_Forum
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14 years ago

Will Nios II work with 16-bit SRAM?

I have been trying to get an external SRAM chip to work with Nios II for over two weeks with no success. I have tested the SRAM outside of SOPC Builder with a simple VHDL routine that writes to each...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Hi.

I had the same problem, when I used a SDRAM controller.

I made a research, I discovered that the problem was the SDRAM chip timing. The SDRAM delays 3ns to response.

So I configured a PLL with 2 clock outputs, one clock (c0) normal with 50MHz for output without delay and an another clock (c1) with 50MHz for output and 3ns delay.

I connected the c1 to the NIOS II clock and the c0 to SDRAM clock.

I'm using a DE0-Nano Board from terasic

"Sorry about my english, I've been learning just over on year."