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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Can’t route signal to atom

Hi,

I have encountered this error during compilation:

Error: Can’t route signal "clk~input" to atom "a"

Error: Can’t fit design in device

I am using Cyclone IV EP4CGX15BF14C8N on Cyclone IV GX Transceiver Kit.

clk~input is connected to pin V11 and a signal is connected to Pin_G6.

Any clue why this happened? and any resolution to this?

1 Reply

  • TKhan7's avatar
    TKhan7
    Icon for New Contributor rankNew Contributor
    7 years ago

    If you apply both a FAST_INPUT_REGISTER assignment to an I/O and a D3_DELAY assignment to the associated delay chain, compilation might fail with an error similar to the above.

    Do not apply both a D3_DELAY assignment and a FAST_INPUT_REGISTER assignment. You may safely apply either assignment, but not both.