How does the rx_st_mask signal affect the behavior of the Hard IP for PCI Express in Arria 10? - How does the rx_st_mask signal affect the behavior of the Hard IP for PCI Express in Arria 10? Description The Avalon®-ST variant of the Altera® Arria® 10 Hard IP for PCI® Express includes the signal rx_st_mask . As stated in the user guide description, you can use this signal to stop sending non-posted requests. Resolution This signal stalls non-posted TLPs. All other TLP types continue to be forwarded to the Application Layer. The stalled non-posted TLPs are held in the RX buffer until the mask signal is deasserted. They are not discarded. When used in a Root Port mode, the rx_st_mask signal stalls all IO read, memory read, and configuration accesses (non-posted transactions). Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 15.0 ['Arria® 10 GT FPGA', 'Arria® 10 GX FPGA', 'Arria® 10 SX FPGA'] ['novalue'] ['novalue'] ['novalue']