Thread: GPIO Tolerance
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Unread 14-02-2012, 20:42
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GPIO Tolerance

What are the tolerances for input voltages for the signal pin of the GPIOs? In other words, at what point does the GPIO switch from reporting true (high) to false (low)? Does the signal pin have to be taken to 0 volts (i.e directly connected to ground) or is there some point where a low enough voltage will be considered low (and thus report false)?