Per risolvere questo problema, aggiungere la seguente assegnazione al file delle impostazioni di Quartus II (.qsf):
set_instance_assignment -nome XCVR_RECONFIG_GROUP MERGE_TX_CDR_PLL -a "TX_Serial_Pin_Name"
set_instance_assignment -name XCVR_RECONFIG_GROUP MERGE_TX_CDR_PLL -to " nome variante |altera_xcvr_cdr_pll_a10:xcvr_cdr_pll_a10_0|twentynm_xcvr_avmm:inst_twentynm_xcvr_avmm|avmm_atom_insts[0].twentynm_hssi_avmm_if_inst"
set_instance_assignment -name XCVR_RECONFIG_GROUP MERGE_TX_ CDR_PLL -to " |*"