Nexys Video Differential IO standard error

[Robert Finch]

I'm trying to use the HDMI input port on the Nexys Video board and I get an error(s):

[DRC 23-20] Rule violation (IOSTDTYPE-1) IOStandard Type - I/O port TMDS_IN_data_n[0] is Single-Ended but has an IOStandard of TMDS_33 which can only support Differential

The hdmi output works fine.

Here is what is in the .xdc file

#HDMI in
##set_property -dict { PACKAGE_PIN AA5   IOSTANDARD LVCMOS33 } [get_ports { hdmi_rx_cec }]; #IO_L10P_T1_34 Sch=hdmi_rx_cec
set_property -dict { PACKAGE_PIN W4    IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_clk_n }]; #IO_L12N_T1_MRCC_34 Sch=hdmi_rx_clk_n
set_property -dict { PACKAGE_PIN V4    IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_clk_p }]; #IO_L12P_T1_MRCC_34 Sch=hdmi_rx_clk_p
create_clock -period 20.000 -name tmds_clk_pin -waveform {0.000 10.000} -add [get_ports TMDS_IN_clk_p];
#set_property -dict { PACKAGE_PIN AB12  IOSTANDARD LVCMOS25 } [get_ports { hdmi_hpd }]; #IO_L7N_T1_13 Sch=hdmi_rx_hpa
#set_property -dict { PACKAGE_PIN Y4    IOSTANDARD LVCMOS33 } [get_ports { ddc_scl_io }]; #IO_L11P_T1_SRCC_34 Sch=hdmi_rx_scl
#set_property -dict { PACKAGE_PIN AB5   IOSTANDARD LVCMOS33 } [get_ports { ddc_sda_io }]; #IO_L10N_T1_34 Sch=hdmi_rx_sda
#set_property -dict { PACKAGE_PIN R3    IOSTANDARD LVCMOS33 } [get_ports { hdmi_rx_txen }]; #IO_L3P_T0_DQS_34 Sch=hdmi_rx_txen
set_property -dict { PACKAGE_PIN AA3   IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_data_n[0] }]; #IO_L9N_T1_DQS_34 Sch=hdmi_rx_n[0]
set_property -dict { PACKAGE_PIN Y3    IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_data_p[0] }]; #IO_L9P_T1_DQS_34 Sch=hdmi_rx_p[0]
set_property -dict { PACKAGE_PIN Y2    IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_data_n[1] }]; #IO_L4N_T0_34 Sch=hdmi_rx_n[1]
set_property -dict { PACKAGE_PIN W2    IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_data_p[1] }]; #IO_L4P_T0_34 Sch=hdmi_rx_p[1]
set_property -dict { PACKAGE_PIN V2    IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_data_n[2] }]; #IO_L2N_T0_34 Sch=hdmi_rx_n[2]
set_property -dict { PACKAGE_PIN U2    IOSTANDARD TMDS_33     } [get_ports { TMDS_IN_data_p[2] }]; #IO_L2P_T0_34 Sch=hdmi_rx_p[2]
 

[D@n]

@Robert Finch,

My guess is that the port isn't properly configured once it enters into your design.  Are you using an IBUFDS?

Dan

[Robert Finch]

Yes, an IBUFDS is being used. The problem has disappeared however. It may have been a bad parameter to IBUFDS a zero was passed instead of "FALSE". I've been editing files, and the last system implementation didn't complain.