Forum Discussion

MOliv45's avatar
MOliv45
Icon for New Contributor rankNew Contributor
6 years ago

DRC check CDC-50001 does not work if the given bit is part of a vector?

Summary: If the bit that is missing a synchronizer is part of a vector, the DRC check CDC-50001 FAILS. VHDL code: library IEEE; use IEEE.STD_LOGIC_1164.all; entity cdc is port ( clk1...
MEIYAN_L_Intel's avatar
MEIYAN_L_Intel
Icon for Frequent Contributor rankFrequent Contributor
6 years ago

Hi,

It seems like the output for pll_locked to output_a is not a timing path.

CDC rules only show violation for timing paths.

Thanks

  • MOliv45's avatar
    MOliv45
    Icon for New Contributor rankNew Contributor
    6 years ago

    Hi,

    Indeed. There is an internal request at intel to discuss if this port should be timed or not.

    I believe it should. In one way or the other the DRC check has to be able to detect a missing synchronizer from an IP port, right?

    Cheers.