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Altera_Forum's avatar
Altera_Forum
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14 years ago

Cyclone 3 power routing

Hello guys, anyone can advise please with the power routing of the 2-layer (double sided) PCB. I've read some recommendations on PLLs, and still not sure if I really can do it properly on such a board.

Any examples? Detailed guidelines for 2-layer boards?

Thank you.

(PS. There're 3 supply voltages and GND)

2 Replies

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

    Hi,

    What package are you targeting? What percentage of the pins will be I/O? For some of the high density BGA's it might not be possible to even break everything out in two layers, but it depends a lot on how many pins you're actually using for I/O.

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

    --- Quote Start ---

    Hi,

    What package are you targeting? What percentage of the pins will be I/O? For some of the high density BGA's it might not be possible to even break everything out in two layers, but it depends a lot on how many pins you're actually using for I/O.

    Mark.

    --- Quote End ---

    Oh please excuse me, this is of course required information

    Q240

    Almost all the pins are used as IOs (no spare pins). All CLK pins will be routed.