Forum Discussion

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

Nios II address range issue

Hi everybody, I am using SOPC to built avalon interface for my custom external logic.i have selected NiosII as master and my custom logic as slave.Using new component Wizard, I have added signal a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

You should not create a custom Avalon slave with a 32-bit address width. The maximum address space of the NIOS is 31 bits (upper bit is used for cache bypass). If you make a component with a 31-bit address space, there is no room for anything else on the processor's bus.

Jake