Stratix V Avalon-ST Interface with SR-IOV PCIe Solutions: User Guide

ID 683488
Date 5/02/2016
Public
Document Table of Contents

9.1. Making Analog QSF Assignments Using the Assignment Editor

You specify the analog parameters using the Quartus® Prime Assignment Editor, the Pin Planner, or through the Quartus® Prime Settings File .(qsf).
Table 98.  Power Supply Voltage Requirements Required PCB voltages depend on the PLL type and data rate.
Data Rate Speed Grade PLL Type VCCR_GXB and VCCT_GXB VCCA_GXB
Gen1 or Gen2 All ATX 1.0 V 3.0 V
Gen1 or Gen2—DFE, AEQ and Eye Viewer not used C2L, C3, C4, I2L, I3, I3L, and I4 CMU 0.85 V 2.5 V
Gen1 or Gen2—DFE, AEQ and Eye Viewer not used C1, C2, I2 CMU 0.90 V 2.5 V
Gen3 All ATX 1.0 V 3.0 V
Gen3 All CMU 1.0 V 3.0 V

The Quartus® Prime software provides default values for analog parameters. You can change the defaults using the Assignment Editor or the Pin Planner. You can also edit your .qsf directly or by typing commands in the Quartus® Prime Tcl Console.

The following example shows how to change the value of the voltages required:

  1. On the Assignments menu, select Assignment Editor. The Assignment Editor appears.
  2. Complete the following steps for each pin requiring the VCCR_GXB and V CCT_GXB voltage:
    1. Double-click in the Assignment Name column and scroll to the bottom of the available assignments.
    2. Select VCCR_GXB/VCCT_GXB Voltage.
    3. In the Value column, select 1_0V from the list.
  3. Complete the following steps for each pin requiring the VCCA_GXB voltage:
    1. Double-click in the Assignment Name column and scroll to the bottom of the available assignments.
    2. Select VCCA_GXB Voltage.
    3. In the Value column, select 3_0V from the list.

The Quartus® Prime software adds these instance assignments commands to the .qsf file for your project.

You can also enter these commands at the Quartus® Prime Tcl Console. For example, the following command sets the XCVR_VCCR_VCCT_VOLTAGE to 1.0 V for the pin specified:
set_instance_assignment -name XCVR_VCCR_VCCT_VOLTAGE 1_0V to “pin”

Did you find the information on this page useful?

Characters remaining:

Feedback Message