Arria V Hard Processor System Technical Reference Manual
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8.3.10. Downsizing Data Width Function
The downsizing function reduces the data width of a transaction to match the optimal data width at the destination. Downsizing does not merge multiple-transaction data narrower than the destination bus if the transactions are marked as noncacheable.
The downsizing function reduces the data width by the following ratios:
- 2:1
- 4:1