AR# 10287

Webpack 3.1i WP2.x : Slew Rate Control for XPLA3 devices : FAST attribute doesn't work in the UCF file for specific nets.

Description

General Description:-

Setting the constraint "NET <netname> FAST; " in the UCF file for an XPLA3 Webpack

project has no effect on the slew rate of the output.

Solution

Change the default Output Slew Rate option to "FAST" in the Implement Design -> Properties menu.

If you need any outputs with slow slew rate, add the "NET <netname> SLOW;" constriant to the

UCF file.

This will be fixed in WebPACK 3.3.

AR# 10287
Date 01/06/2010
Status Archive
Type General Article