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AR# 15778

5.1isp1 Architecture Wizard - The DCM wizard does not ground the DSSEN port in a VHDL flow

Description

General Description: 

In my VHDL flow, first time I run the DCM Wizard, the DSSEN pin is grounded correctly. However, if I re-open that existing XAW file in the DCM Wizard and save it again, the DSSEN pin is no longer grounded. VHDL synthesis will then fail because the DSSEN pin is floating.

Solution

This problem is fixed in the latest 5.1i Service Pack, available at: 

http://support.xilinx.com/support/techsup/sw_updates
The first service pack containing the fix is 5.1i Service Pack 2.  

 

Alternately, you may work around the problem by manually connecting DSSEN to GND after generating the VHDL file.

AR# 15778
Date Created 09/03/2007
Last Updated 05/08/2014
Status Archive
Type General Article