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CS72's avatar
CS72
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2 years ago
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is there the same silicon chip used in different housings

Hi,

if one can buy the same size in different housings, will the chip be the same for the housing with lowest and highest Pin Count?

Would e.g. same silicon chip being housed in 484Pin BGA (i.e. having xyz IO) used in the 240Pin QFP with "just" not connected IO cells due to lower pin count?

Fpga Devkit
Generic Io
  • WZ2's avatar
    WZ2
    2 years ago

    Hi there,

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  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    2 years ago

    Answer is yes.

    What is the question behind? What do you want to achieve?

    • CS72's avatar
      CS72
      Icon for New Contributor rankNew Contributor
      2 years ago

      Hi,

      thanks for the quick response.
      The Idea behind is to minimize (to zero?) the changes in the configuration data when switiching the housing (due to availability from the currently used QFP to an BGA) by assigning the matching BGA pin to the signal currently assigned to the 240'er housing pins.

      Assignment of the BGA Pin being bonded to the IO cell used for the signal with the QFP should (imho) result in same configuration data, as the silicon is identical and thus the IO cell "does not know" if the signal is connected to QFP PinX or BGA Pin Y...

      We have a tested and many years in service proven programming which should be ported to a BGA housing with better availability meanwhile.

      Thus, I think a crossreference would be the way forward, like QFP PinX => BGA PinY, ...