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  3. AR# 5549: M1.5i Virtex Timing - Timing Engine incorrectly propagates PERIOD thru 2 CLKDLLs in Virtex.

AR# 5549

M1.5i Virtex Timing - Timing Engine incorrectly propagates PERIOD thru 2 CLKDLLs in Virtex.

Description

General Description:

Using the Virtex DLL appnote, a 4x clock specification was

created. A NET PERIOD constraint was put on the clock pad

net. The PERIOD is adjusted through the first DLL correctly,

but is not adjusted for the second DLL. If gets the same value

as the first DLL.

Solution

A fix for this problem is included in the 1.5i Service Pack 2. For details

on this Service Pack see http://www.xilinx.com/techdocs/5887.htm

AR# 5549
Date 01/18/2010
Status Archive
Type General Article