Hi Adam,
Is your question, how do you connect AXI4 up to a memory that only supports word addressing? The memory would ignore the lower bits of address that correspond to the byte addresses and it would ignore strb totally. If there is a write data operation as signified by Valid and Ready, then all 32 bits get written into memory. There is no requirement on AXI for the subordinate, like dpRAM to pay any attention to strb.
Best Regards,
Jim
