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AR# 21440

7.1i Virtex-4 MAP - "LIT 382 For DSP48 symbol "xxx" attribute LEGACY_MODE is set to NONE. This does not match with the OPMODE setting."

Description

I have encountered a problem where MAP fails if a timing-driven packing (-timing) is used in a design with DSP48 slices. The related error occurs: 

 

"ERROR:LIT:382 - For DSP48 symbol 

"physical_group_Mmult__n0012_PCOUT471/Mmult__n0012_inst_dsp_1" (output 

signal=Mmult__n0012_PCOUT471) attribute LEGACY_MODE is set to NONE. This does 

not match with the OPMODE setting."

Solution

This problem has been fixed in ISE 7.1i SP3. For earlier revisions, this error can be avoided by setting the environment variable XIL_MAP_NO_DSP_AUTOREG or by not using -timing. 

 

For general information about setting ISE environment variables, see (Xilinx Answer 11630).

AR# 21440
Date Created 09/04/2007
Last Updated 05/19/2014
Status Archive
Type General Article