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tyassin's avatar
tyassin
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2 days ago
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MAX10 (10M02SCU169I7G) - VREF pins

Hi, I have a single supply device with 3.3V. I have to clarify my undestanding of the VREF pins. They seem to have a dual purpose on this device: Can provide another reference voltage than the no...
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  • FvM's avatar
    FvM
    2 days ago

    Hi,

    VREF pins are used for voltage referenced I/O standards like SSTL, e.g. for DDR RAM. If not needed for this purpose, they are available as regular IO pins. Treat unused VREF pins like any unused IO, e.g. activate weak pull-up to avoid floating.

    Regards Frank

tyassin's avatar
tyassin
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2 days ago

I see. 
Thank you very much for explaning.

Br. Thomas

AqidAyman_Altera's avatar
AqidAyman_Altera
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2 days ago

Yes, Frank is correct. You can refer to the Pin Connection Guidelines for MAX 10.

https://docs.altera.com/r/docs/683232/current/max-10-fpga-device-family-pin-connection-guidelines/differential-i/o-pins#:~:text=or%20GND.-,VREFB%3C%23%3EN0,-Power%2C%20I/O