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

ID 683364
Date 12/15/2018
Public
Document Table of Contents

4.1.4. Avalon® -MM Unaligned Burst Expansion Bridge

The Avalon® -MM Unaligned Burst Expansion Bridge aligns read burst transactions from masters connected to its slave interface, to the address space of slaves connected to its master interface. This alignment ensures that all read burst transactions are delivered to the slave as a single transaction.
Figure 113.  Avalon® -MM Unaligned Burst Expansion Bridge


You can use the Avalon® Unaligned Burst Expansion Bridge to align read burst transactions from masters that have narrower data widths than the target slaves. Using the bridge for this purpose improves bandwidth utilization for the master-slave pair, and ensures that unaligned bursts are processed as single transactions rather than multiple transactions.

Note: Do not use the Avalon® -MM Unaligned Burst Expansion Bridge if any connected slave has read side effects from reading addresses that are exposed to any connected master's address map. This bridge can cause read side effects due to alignment modification to read burst transaction addresses.
Note: The Avalon® -MM Unaligned Burst Expansion Bridge does not support VHDL simulation.