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Altera_Forum
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8 years ago

Factory pin state value

When i buy Altera FPGA (Cyclone V GX for example), solder it on board, and give right voltage to power pin, wich state of user I/O pin i must see ? I think Tri-stated? Can somebody show me official documentation where i can see this information?

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

    State of unconfigured IO pins is tri-stated with weak-pull-up. See device handbook, e.g.Figure 7-1: Configuration Sequence for Cyclone V Devices.