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AR# 24638

9.1 Timing - Virtex-5 - ODDR timing Violation

Description

Virtex-5 fails timing with ODDR operating in SAME_EDGE mode. The analyzer looks for the raising edge to falling edge instead of raising edge to raising edge

Solution

To work around this issue for the earlier versions, use the FROM-TO constraint.

This problem has been fixed in the latest 9.1i Service Pack available at:

<http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp>
The first service pack containing the fix is 9.1i Service Pack 3.

AR# 24638
Date Created 09/04/2007
Last Updated 01/18/2010
Status Archive
Type General Article