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Honored Contributor
Honored ContributorAvalon 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_ForumHonored Contributor
Honored ContributorHowever, in practise, you don't want to do it.
Instead create a 32bit slave that ignores the high bits on writes and returns zeros on reads. Remembering to look at the byte enables. If you have an 8bit slave you'll get a bus width adapter added than generates 4 cycles to your slave for every access done by the nios. Also, since the nios always asserts all 4 byte enables on reads, the data fifo probably work work properly.
