Description
The Hard IP for PCI Express® with Avalon-MM interface requires the TAG field to be set as shown below for Non-Posted accesses.
TAG = 0x00 - 0x07 : Txs Slave Port
TAG = 0x08 - 0x0F : Reserved
TAG = 0x10 - 0x1F : CRA Slave Port
For Posted accesses, there is no requirement.