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Altera_Forum's avatar
Altera_Forum
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9 years ago

Why do the number of VCCIO and GNDIO pairs more than number of banks in a device?

I assumed that there is a VCCIO for each bank. However, it seems that a single bank can have multiple VCCIO and GNDIO connections.

As far I understand a single bank shall have a single IO voltage which can be different from another bank but must be within the specified device limits.

Why does a singe bank need multiple VCCIO and GNDIO connections?

1 Reply

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

    Each bank may, and usually does, have multiple VCCIO pins. This reduces the impedance onto the die. All VCCIO pins, for a particular bank, are clearly identified and must connect to the same power net.

    Cheers,

    Alex