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AR# 15483

5.1i Constraints Editor - LVDSEXT_25 is missing from a list of valid I/O standards for Virtex-II Pro

Description

General Description:

I am attempting to set an I/O to LVDSEXT_25 in Constraints Editor, but I am not allowed to do so. How do I set this?

Solution

To set this, manually edit the UCF, adding the desired I/O standard.

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.

AR# 15483
Date Created 09/03/2007
Last Updated 01/18/2010
Status Archive
Type General Article