RF/IF encoder/decoder IC's such as this one, will accept the address-pin in one of 3 states:
As per this excellent answer, I believe "Floating" input can assume either High or Low value due to variations in the EM field, if I understood it correctly. If so, then why if floating a valid state ? At the time the IC is reading the value of the pin, how does it determine that the pin is really pulled HIGH or LOW, versus a floating-pin that was inadvertently pulled up/down such as due to ambient EM noise (I'm assuming that such a thing is possible).
Also in line with the question in the context of which the above mentioned answer was given, can someone explain, through non-technical analogy, the difference between weakly pulled up/down versus strongly pulled up/down ?