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AR# 19074

6.2i NGDBuild - (Spartan-3) "WARNING:NgdBuild:488 on LVPECL_25 is invalid"

Description

Keywords: standard, valid, OBUFDS

Urgency: Standard

General Description:
On my Spartan-3 design I used an OBUFDS primitive, and set the standard to LVPECL_25. This is supposed to be a valid standard for Spartan-3, but when I run NGDBuild, I receive the following:

WARNING:NgdBuild:488 - Attribute value "LVPECL_25" is not an accepted value for attribute "IOSTANDARD" on "output_lvds_n".
WARNING:NgdBuild:488 - Attribute value "LVPECL_25" is not an accepted value for attribute "IOSTANDARD" on "output_lvds_p".

Is this warning a mistake?

Solution

Yes, the tools should not issue this warning. The LVPELC_25 was missing from the list of NGDBuild valid standards.

This will be fixed in a future release of the software.
AR# 19074
Date Created 03/02/2004
Last Updated 02/21/2007
Status Archive
Type General Article