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REics's avatar
REics
Icon for New Contributor rankNew Contributor
6 years ago

What happens when I/O is configured as BLVDS but VCCIO pin is fed by 3.3V?

I have a design (already mass produced) where the VCCIO is fed with 3.3V, but I/Os on it are configured as BLVDS.

What happens? Does it damage the device? Does it just create an out of spec BLVDS output signal?

3 Replies

  • YuanLi_S_Intel's avatar
    YuanLi_S_Intel
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    Hi Rolf,

    May i know which device you are using? If is much recommended if you could supply the VCCIO needed for BLVDS.

    Thank You.

  • REics's avatar
    REics
    Icon for New Contributor rankNew Contributor
    6 years ago

    It's a EP4CE40F23C8N. I know it's not recommended and I won't deliberately do it, but I have a number of devices out in the field already and want to know what the effects of this are. My BLVDS signal looks ok and does what I want, the question is more I run the risk of damaging something. I have set the outputs to lowest current (8mA) as security measure, though.