Article ID: 000085778 Content Type: Troubleshooting Last Reviewed: 09/11/2012

What is the status of the I/O pins if the VCCIO of the I/O Bank's in which these pins reside is not applied during configuration for Stratix® II, Stratix® and Cyclone® devices?

Environment

  • I O
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description During configuration, if VCCIO is withheld from any non-configuration(1) I/O bank, the bank will behave as described by Altera's hot socketing guidelines.  The I/O pins in the unpowered banks will be tristated with the corresponding weak pull-ups disabled.

    (1) It is possible to leave some banks unpowered although VCCIO must be applied to the I/O banks that contain configuration pins.  If VCCIO is not applied to the configuration banks, configuration will not be successful.

    Related Products

    This article applies to 3 products

    Cyclone® FPGAs
    Stratix® FPGAs
    Stratix® II FPGAs

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