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

ID 683609
Date 10/04/2021
Public

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5.12.6. Width Adaptation and Data Packing in Platform Designer

Data packing applies only to systems where the data width of hosts is less than the data width of agents.

The following rules apply:

  • Data packing is supported when hosts and agents are Avalon® memory mapped.
  • Data packing is not supported when any master or slave is an AMBA* 3 AXI, AMBA* 4 AXI, or APB component.

For example, for a read/write command with a 32-bit host connected to a 64-bit agent, and a transaction of 2 burstcounts, Platform Designer sends 2 separate read/write commands to access the 64-bit data width of the agent. Data packing is only supported if the system does not contain AMBA* 3 AXI, AMBA* 4 AXI, or APB masters or slaves.