tx_buf_av - tx_buf_av - 4.4 English - PG156

UltraScale Devices Gen3 Integrated Block for PCI Express LogiCORE IP Product Guide (PG156)
Document ID
PG156
Release Date
2024-12-06
Version
4.4 English

The buffer availability has been split into three individual signals for the AXI4-Stream (Enhanced) Requester Request interface.

  • pcie_tfc_nph_av indicates the currently available header credit for non-posted TLPs on the transmit side of the core.
  • pcie_tfc_npd_av indicates the currently available payload credit for non-posted TLPs on the transmit side of the core.
  • pcie_rq_tag_av indicates the currently available header credit for non-posted TLPs on the transmit side of the core.