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Related

differential PIn

Former Member
Former Member over 9 years ago

Hi all,

I have in my entity those Input :
       LVDS1_CAP: input
       LVDS1_CAN: input
       LVDS1_CA : output

       LVDS1_CBP: input
       LVDS1_CBN: input
       LVDS1_CB : output

I have created my file IOBFDS :

IBUF_inst_LVDS1_CA : IBUFDS
             generic map (
                IOSTANDARD => "LVDS_25")
             port map (
                O => LVDS1_CA,   
                I => LVDS1_CAP,
                  IB => LVDS1_CAN       
             );
            
              IBUF_inst_LVDS1_CB : IBUFDS
                         generic map (
                            IOSTANDARD => "LVDS_25")
                         port map (
                            O => LVDS1_CB,   
                            I => LVDS1_CBP,
                              IB => LVDS1_CBN       
                         );


with the LVDS1_CAN and CAP they had been declared in pin p17

but for LVDS1_CBP it shows me this error:

[Vivado 12-1411] Cannot set LOC property of ports, Could not legally place instance Inst_input_buffers/IBUF_inst_LVDS1_CB at M21 (IOB_X1Y70) since it belongs to a shape containing instance LVDS1_CBN. The shape requires relative placement between Inst_input_buffers/IBUF_inst_LVDS1_CB and LVDS1_CBN that cannnot be honored because it would result in an invalid location for LVDS1_CBN. ["D:/2014.1/init.2/Viimagic_2.1/Viimagic_2.1.srcs/constrs_1/imports/new/Viimagic.xdc":47]

I don't understand I have done the same declaration and it doesn't work for both pins.

Ps: i have done my project first at 2015.3 evrything was fine.
But now i have done the same thing at 2014.1 it shows me this wired error.

Could someone help me please.

Thank you for your quick feedbacks.

-Anisse BELMAJY

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  • Former Member
    0 Former Member over 9 years ago

    Thank you so much Mario.
    It works finally

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  • Former Member
    0 Former Member over 9 years ago

    Thank you so much Mario.
    It works finally

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