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I was looking at a datasheet for a microcontroller and noticed that, under its section for GPIO input voltage (p.14), there is no listed maximum for the high input, only a minimum. Does this indicate that, ensuring I keep current below the maximum (which I would assume to be 20mA from the current sink specs), I would be able to put any voltage through the pin?

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Max voltage on any I/O pin Vdd+0.3

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A logic high is whenever the voltage on the input pin >= 0.7Vdd A logic low is whenever the voltage on the input is <= 0.3Vdd

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