GPIO input read HIGH with less than 0.7vdd threshold?

RE: GPIO input read HIGH with less than 0.7vdd threshold?

kukru — Thu, 03 Aug 2023 13:31:09 GMT

Thank you very much for the clarification, even if I'm not expect to work in undefined range, I thought it is valid at first.

RE: GPIO input read HIGH with less than 0.7vdd threshold?

runsiv — Thu, 03 Aug 2023 12:40:10 GMT

Hi Kavin

I agree with Jörg here. If you are in the undefined range you can't know what will happen and will need to adjust the signal.

Regards

Runar

RE: GPIO input read HIGH with less than 0.7vdd threshold?

Turbo J — Thu, 03 Aug 2023 06:49:08 GMT

Careful with the digital I/Os. The range between V_IL max and V_IH min is forbidden. The input behavior is undefined and may change between MCU examples and different pins even on the same MCU.

If you expect input signals in that range for any noteworthy amount of time, use the analog comperator.