Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

about sdram addrss/data bus shared

hi all: In tne altera reference design, the SDRAM not share address/data bus with flash, sram, lan chip. But in my design I shared sdaram address/data bus with flash to reduce IO pins...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Sounds like you have hardware issues. If you have SDRAM and Flash on the same bus (which is a bad idea IMO), the SDRAM bus will be more heavily loaded, meaning you should test it for stability first.

- You should run the SDRAM at full speed with a hardware core to verify for errors

- Have you downloaded just to SDRAM and run from RAM instead of Flash?

- If you can, disable or remove the Flash chip and just run from SDRAM. This should help you narrow down the problem.