AR# 8244

2.1isp3 Virtex Bitgen: Virtex bit file from bitgen with default options causes improper behavior on CLKDLL


Keywords: Virtex, CLKDLL, bitgen, sp3, bit, sp2

Urgency: Hot

General Description:

NOTE: This solution assumes that you have already installed the SP3 update.

A Virtex bit file produced from 2.1iSP3 bitgen is different than that produced from
sp2. The DLL feedback will be stuck at high or low, so the DLL will not lock. This
would only affect Virtex devices using SP3. VirtexE devices will still work fine.


This problem is fixed in the latest 2.1i Service Pack available at:

AR# 8244
Date 12/10/2001
Status Archive
Type General Article