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AR# 31763

Virtex-5 Configuration - CONFIG POST_CRC constraint requirement for designs with dynamic content

Description

The Post Config CRC check is failing in my design with SRL16 or LUTRAM. Why?

The Post Config CRC feature is set by setting the following constraint in the UCF file:

CONFIG POST_CRC = ENABLE;

Solution

The Post Config CRC feature will require a patch with 10.1.03 if the design contains dynamic content such as SRL16 or LUT-RAM.

There is an issue with the software where the GLUTMASK bit in the Configuration Options Register does not get written to correctly. This issue has been resolved in ISE tools 11.1, and a patch is available for 10.1.03 from the link below.

http://www.xilinx.com/txpatches/pub/utilities/fpga/31763.zip
AR# 31763
Date Created 10/03/2008
Last Updated 12/15/2012
Status Active
Type General Article