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CosmoKramer's avatar
CosmoKramer
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

direction of signals in rtl viewer

this is from quartus rtl viewer. would like to learn how to read this diagram.

Q is output of the flop. but why does the black arrow (circled with blue) point towards Q like it is an input to flop.

it looks like data from mux is input into flop at Q, which is not correct.

please help me understand this.

Thanks Y'all

3 Replies

  • sstrell's avatar
    sstrell
    Icon for Super Contributor rankSuper Contributor
    5 years ago

    What does the vertical wire connected to that point go to?

  • CosmoKramer's avatar
    CosmoKramer
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    Here is the picture showing the vertical line. It looks like it is going to a mux. but i am not sure.

  • SyafieqS's avatar
    SyafieqS
    Icon for Super Contributor rankSuper Contributor
    5 years ago

    Hi Sandhya,


    Assuming no issue with your HDL, does your rtl behave as expected if you ignore that? What Quartus type and version you are using?


    Thanks,

    Regards