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Can a GPIO input pin of CC2640R2F with VDDS=1.8V work with 3.3V input signals?

Michael Wang
Prodigy 90 points
Other Parts Discussed in Thread: CC2640R2F

Hi,

I have a CC2640R2F working with 1.8V power supply, does this CC2640R2F input pins have 3.3.V input tolerance? If I applied a 3.3V input to its input pin, can it read the input logic properly and the CC2640R2F will not be damaged?

Thanks,

Michael Wang

  • +1
    TI__Expert 6520 points

    Hi Michael,

    If VDDSx is 1.8V then a 3.3V input to the pins associated with that supply would exceed the absolute maximum rating of the pins as specified in the datasheet.

    If you do need to have I/O at different voltages, then you can supply those voltages as per section 9.11 of the datasheet:

    Thanks,

    Jake