DDR2 UniPhy OCT

[Altera_Forum]

Hi, 

I am using DDR2 Uniphy and get an Error on calibrated OCT:  I run tcl after synthesis and tcl run successfully as qsf updated, for instance DDR IO constrained properly :  "set_instance_assignment -name IO_STANDARD "SSTL-18 CLASS I" -to DDR2_DQ [*]set_instance_assignment -name INPUT_TERMINATION "PARALLEL 50 OHM WITH CALIBRATION" -to DDR2_DQ [*] -tag __mtx_st820_mem_if_ddr2_emif_0_p0 set_instance_assignment -name OUTPUT_TERMINATION "SERIES 50 OHM WITHOUT CALIBRATION" -to DDR2_DQ [*] "  I get the following error:  "Error (174068): Output buffer atom "mtx_st820:mtx_st820|mtx_st820_mem_if_ddr2_emif_0:mem_if_ddr2_emif_0|mtx_st820_mem_if_ddr2_emif_0_p0:p0|mtx_st820_mem_if_ddr2_emif_0_p0_memphy:umemphy|mtx_st820_mem_if_ddr2_emif_0_p0_new_io_pads:uio_pads|mtx_st820_mem_if_ddr2_emif_0_p0_altdqdqs:dq_ddio[0].ubidir_dq_dqs|altdq_dqs2_ddio_3reg_stratixiv:altdq_dqs2_inst|extra_output_pad_gen[0].obuf_1" has port "SERIESTERMINATIONCONTROL[0]" connected, but does not use calibrated on-chip termination"  Why I getting this ERROR?  Thanks

[Altera_Forum]

Have you tried setting OUTPUT_TERMINATION "SERIES 50 OHM with CALIBRATION" instead? Your bidir DDR2_DQ have parallel termination with calibration during input, yet during outputs it doesn't use it.

[Altera_Forum]

Thanks, but I have tried and still getting the same errors...

[Altera_Forum]

Did you check if the assignments are ignored under Ignored Assignments?