New member...I have searched everywhere and am struggling with the precept of high impedance input being very susceptible to circuit noise thus requiring a pull-up resistor (internal or external) for microcontroller pins. Doesn't high impedance mean high resistance/Ohms? If that is the case wouldn't the input require a higher current to change the states instead of being influenced by low power noise?. I understand the function of the pull-up (down) resistor for current limiting and stable state. Here are the 2 articles that reference the situation.
and
ATmega8 protostack simple demo | YourITronics
paragraph 4. Any help would be great. Thanks
and
ATmega8 protostack simple demo | YourITronics
paragraph 4. Any help would be great. Thanks