Forum Discussion

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

SDRAM problem in SOPC builder

Hi, I get this warning message in SOPC builder saying: "Warning: cpu: The address range of the slaves connected to the NIOS 2 instruction master exceeds 28 bits. Attempts to call function acr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

A 'window bridge' could be created to limit the CPU visibility into the memory. They are pretty easy to implement, you make one side of the bridge have fewer address bits than the other and for the most part it acts as a passthrough. There are other reasons for using a window bridge but limiting how much address span is exposed to the instruction master happens to be one of them.