Intel® Arria® 10 and Intel® Cyclone® 10 GX Avalon® Streaming Interface for PCI Express* User Guide

ID 683647
Date 6/03/2021
Document Table of Contents

12.1. Making Pin Assignments to Assign I/O Standard to Serial Data Pins

Before running Quartus® Prime compilation, use the Pin Planner to assign I/O standards to the pins of the device.
  1. On the Quartus® Prime Assignments menu, select Pin Planner.
    The Pin Planner appears.
  2. In the Node Name column, locate the PCIe serial data pins.
  3. In the I/O Standard column, double‑click the right‑hand corner of the box to bring up a list of available I/O standards.
  4. Select the appropriate standard from the following table.
    Table 75.  I/O Standards for PCIe Pins
    Pin Type I/O Standard
    PCIE REFCLK Current Mode Logic (CML), HCSL
    PCIE RX Current Mode Logic (CML) 5
    PCIE TX High Speed Differential I/O 6
The Quartus® Prime software adds instance assignments to your Quartus® Prime Settings File (*.qsf). The assignment is in the form set_instance_assignment -name IO_STANDARD <"IO_STANDARD_NAME"> -to <signal_name> . The *.qsf is in your synthesis directory.
5 AC coupling is required at the transmitter for the PCIE RX signals.
6 AC coupling is required at the transmitter for the PCIE TX signals.