Forum Discussion

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

Avalon 8 bit with Nios 32 bit possible?

It is possible to create a component (ex. UART) with avalon MM slave interface with 8 bit data width and use it with Nios II with 32 bit bus? I tried and compile fine but Nios II don't start on re...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

As as far as I know the nios always asserts all 4 byte enables on reads - and discards the unwanted bytes later.

The bus width adapters are also well known for generating master cycles with no asserted byte enables.

If you also end up with a clock crossing bridge the transfers get very slow indeed.