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AR# 24292

9.1i MAP - "ERROR:Pack - The I/O component "SPI4_RDAT1_N[0]" has an illegal IOSTANDARD value"

Description

My design mapped in a previous revision of ISE with no problems. I have not changed the I/O configurations, but now the design fails in version 9.1i with IOSTANDARD errors:

"ERROR:Pack - The I/O component "SPI4_RDAT1_N[0]" has an illegal IOSTANDARD

value. The IOB component is configured to use differential signaling and can

not use single-ended IOSTANDARD value LVCMOS25. Please correct the

IOSTANDARD property value or the I/O connectivity."

Solution

In version 9.1i, MAP no longer attempts to correct illegal IOSTANDARDs or unspecified IOSTANDARDs by assigning a default value. Consequently, errors can occur that did not occur in previous revisions. You can restore the automatic correction of IOSTANDARDS by setting the following applicable environment variable:

Windows

SET XIL_MAP_FIXIOSTD=1

Linux

setenv XIL_MAP_FIXIOSTD 1

For general information on setting the ISE environment variable, see (Xilinx Answer 11630).

AR# 24292
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article