AR# 8809

3.1i Constraints Editor - I cannot specify I/O configuration options for global ports

Description

General Description:

Although I have selected several I/O configuration options from the Ports tab, the option to change the IOSTANDARD column is not available for any ports.

Solution

To work around this problem, hand-edit the UCF with the following syntax:

INST "<ibufg_or_bufg_inst_name>" IOSTANDARD= <io_standard>;

AR# 8809
Date 01/18/2010
Status Archive
Type General Article