Answers Database


FLOORPLANNER-XACT: Cannot see STARTUP, READBACK, of BSCAN symbols in my foorplanner.


Record #2153

Product Family: Software

Product Line: XACT FPGA

Product Part: floorplanner-XACT

Product Version: 6.0.1

Problem Title:
FLOORPLANNER-XACT: Cannot see STARTUP, READBACK, of BSCAN symbols in my foorplanner.


Problem Description:
Urgency: Low

General Description: In floorplanner, you will not be able to see some of the symbols you have place d in your design.

Also running PPR from Floorplanner may give you warning such as this:

    "Warning: net ____ has no load ...."

Where the net is the input signal driving the pins of BSCAN, STARTUP or READBACK.


Solution 1:

Symbols such as BSCAN, STARTUP and READBACK are special symbols that user can instantiate in the des ign to activate these features that are already available within the architecture. These symbols are NOT physical components that user have control over in floorplanner.

Running Place and Route from Floorplanner will NOT connect signals to BSCAN, STARTUP or READBACK sym
bols and may trim out the logic related to these symbols.   Place and Route from Floorplanner should
 be used ONLY to evaluate portions of the design.  Therefore, you will need to run final ppr from ou
tside of floorplanner.





End of Record #2153 - Last Modified: 05/24/99 12:18

For the latest news, design tips, and patch information on the Xilinx design environment, check out the Technical Tips!