If high means high volt... then its logic is high, I mean when it is read by an internal instruction.When we use pull up resistor with port assigned as input then what will be its logic state? active high or active low.
I completely agree with aith what tgil said. But this is the case with pins like RESET*, But normal GPIO pins (on microcontroller) can be said as pulled low or high and can't be said active high/active low.In your case, if your microcontroller takes an action when your pulled-up input is low, then the input is active low. Otherwise, it is active high.
A pull-up/pule-down resistor is just a high value resistor (like 47K or 100k) that provides the voltage to the input pin when no other device/circuit is connected or when the connected circuit has a high resistance.When we use pull up resistor with port assigned as input then what will be its logic state? active high or active low.
I would call this a bufferGuys I tell you what is Active High and Active Low
Suppose that we have a device which has input and output.
When input of the device goes high then output of the device also goes high. This device is known as Active High Device i.e A device which becomes Active on High input.
And I would call this an inverterWhen input of the device goes low then output of the device goes high. This device is known as Active Low Device i.e A device which becomes Active on Low input.