Forum Discussion

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

External SSRAM reading/writing problem

Hello everyone, I want to connect nios core (cyclone ii) to external sram memory (cy7c1380d) but I'm experiencing a problem while reading/writing to/from the memory. For 2MB (data width 32 bit...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Avalon always uses byte addressing, even for 32bit data slaves.

So you must discard address[0] and address[1] if your ssram only supports 32bit addressing.

I also suggest to use uncached access (set the 32th bit of buffer) in order to prevent cpu fetching data from cache instead of actually reading back rom ssram. Anyway I think this is not your problem now.