General Description: When instantiating an OBUFDS_LVPECL_33 in HDL code, I receive an NGDBuild error indicating that the component is unexpanded:
"ERROR:NgdBuild:432 - logical block 'OBUFDS_1' with type 'OBUFDS_LVPECL' is unexpanded."
This problem exists only for outputs; inputs instantiated in the same way work successfully.
解决方案
This configuration is currently not supported in the current software; it will be fixed in the next major software release, which is due out in August, 2001.