Altera Arria V Avalon-ST - Manual (Page 60)

pld_clk
tx_st_data[127:0]
tx_st_sop
tx_st_eop
tx_st_empty
tx_st_ready
tx_st_valid
tx_st_err
000 CC... CC... CC... CC... CC... CC... CC... CC... CC... CC... CC...
Root Port Mode Configuration Requests
If your Application Layer implements ECRC forwarding, it should not apply ECRC forwarding to
Configuration Type 0 packets that it issues on the Avalon-ST interface. There should be no ECRC
appended to the TLP, and the
TD
bit in the TLP header should be set to 0. These packets are processed
internally by the Hard IP block and are not transmitted on the PCI Express link.
To ensure proper operation when sending Configuration Type 0 transactions in Root Port mode, the
application should wait for the Configuration Type 0 transaction to be transferred to the Hard IP for PCI
Express Configuration Space before issuing another packet on the Avalon-ST TX port. You can do this by
waiting for the core to respond with a completion on the Avalon-ST RX port before issuing the next
Configuration Type 0 transaction.
2014.12.15
Root Port Mode Configuration Requests 4-23
Interfaces and Signal Descriptions Altera Corporation
Send Feedback