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Altera_Forum's avatar
Altera_Forum
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12 years ago

Reference Design, What should I do with DNI component??

I trying to design a board using the reference design of ALTERA cyclone V, I found many DNI components (resistors and capacitor), what i have to do with this components?, opened circuit?

In the LPDDR2 schematic there are singal CK and CK# (clocks) have a resistor DNI between them, besides in this schematic i saw DQ[0..31] (data port ) have connected the DQ[16..31] connected to ground by resistors DNI?

thanks in advance

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    Hi Akael:

    DNI stands for Do Not Install:

    These components may have been placed on the schematic for many reasons. IE your DQ lines are probably because one version of the schematic only supported a 16 bit memory, while another supports the full 32 bit interface.

    The CK and CK# resistor is probably for termination.

    If you are confident you know what the resistor position is there, you can safely remove them from your schematic.

    Pete
  • EPalo4's avatar
    EPalo4
    Icon for New Contributor rankNew Contributor
    6 years ago

    Thanks Akael to make this question because the answer that Pete gave you helped me a lot thanks both.