Intel® Quartus® Prime Pro Edition User Guide: Platform Designer

ID 683609
Date 10/04/2021
Public

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5.10.8. Unaligned Address Commands

Unaligned address commands are commands with addresses that do not conform to the data width of a slave. Since Avalon® memory mapped slaves accept only aligned addresses, Platform Designer modifies unaligned commands from AXI masters to the correct data width. Platform Designer must preserve commands issued by AXI masters when passing the commands to AXI slaves.
Note: Unaligned transfers are aligned if downsizing occurs. For example, when downsizing to a bus width narrower than that required by the transaction size, AWSIZE or ARSIZE, the transaction must be modified.