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AR# 17469

6.1i Virtex-E PAR - Auto-hold time checking feature for Virtex/-E and Spartan-II/-E devices

Description

Keywords: hold time, Virtex-E, Spartan-II, XIL_ROUTE_FIXHOLDVIOLATIONS

Urgency: Standard

General Description:
In 6.1i, PAR supports an auto-hold time checking feature for Virtex-II and Virtex-II Pro devices.

In 6.1i SP1, this feature is extended to the Virtex/-E and Spartan-II/-E devices. Since min-timing is not supported for these architectures, the hold time elimination will be based on max-max delays (rather than min-max delays).

Solution

This problem has been fixed in the latest 6.1i Service Pack, available at:
http://support.xilinx.com/support/techsup/sw_updates
The first service pack containing the fix is 6.1i Service Pack 1.

You must also set the following environment variable:

PCs
SET XIL_ROUTE_FIXHOLDVIOLATIONS=1

Workstations
setenv XIL_ROUTE_FIXHOLDVIOLATIONS 1
AR# 17469
Date Created 09/03/2007
Last Updated 10/20/2008
Status Archive
Type General Article