AN 922: Using the ECO Compilation Flow

Download PDF
ID 683873
Date 3/31/2022
Public
Document Table of Contents
Document Table of Contents x
1. AN 922: Using the ECO Compilation Flow
1. AN 922: Using the ECO Compilation Flow x
1.1. Step 1: Open the Design Example Project 1.2. Step 2: Run the ECO Flow 1.3. Step 3: Implement Targeted ECOs 1.4. ECO Tcl Script Example 1.5. ECO Command Limitations 1.6. Document Revision History for AN 922: Using the ECO Compilation Flow
1.3. Step 3: Implement Targeted ECOs x
1.3.1. Modify the Lutmask 1.3.2. Change Routing Connections 1.3.3. Tie Off Input Port to GND 1.3.4. Modify Slew Rate, Current Strength, and Delay Chain 1.3.5. Place A Node in a New Location 1.3.6. Create a Wire LUT Atom
1.3.6. Create a Wire LUT Atom x
1.3.6.1. Running Incremental Flow with Signal Probe
1. AN 922: Using the ECO Compilation Flow

1.3.3. Tie Off Input Port to GND

To tie off the DSP ENA[0] port to GND, follow these steps:

  1. In the Node Finder, find and right-click node my_dsp_inst0, and then click Locate Node > Locate in Resource Property Viewer.
  2. Click the DSP Elements tab. In the Connectivity pane, locate ENA[2..0] in the Input Port Name column. ENA[0] is set to VCC.
    Figure 9.  my_dsp_inst0 Before ECO Change
  3. Click Processing > Start > Perform ECO Compilation. Specify and run eco_demo_3.tcl. eco_demo_3.tcl contains the following make_connection ECO command: 
    make_connection -tieoff GND -to {my_dsp_inst0|mult_inst|lpm_mult_0|\
   lpm_mult_component|auto_generated|mult_0~mac} -port {ENA[0]}
  4. Repeat steps 1 and 2 to view the ECO change in Resource Property Viewer.
    Figure 10.  my_dsp_inst0 After ECO Change
Level Two Title