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sylvain23
Visitor II
November 21, 2003
Question

STPC Vega : Finding a tri-state output

  • November 21, 2003
  • 2 replies
  • 787 views
Posted on November 21, 2003 at 09:41

STPC Vega : Finding a tri-state output

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    2 replies

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    sylvain23Author
    Visitor II
    November 17, 2003
    Posted on November 17, 2003 at 09:34

    Do you know the default state of GPIO (before initialization).

    I need an ouput in tri-state before bios has finish is initialization.

    thanks.

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    stephen239955_st
    Visitor II
    November 21, 2003
    Posted on November 21, 2003 at 09:41

    After reset, GPIOs are in input. This means that SPTC is not driving it. Depending on what you have on boards, if no-one else is driving it, then it will be in tri-state.

    They remain in this condition until they are initialised, that is when the system needs them.
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