about ATmega328 ADC pins

[fm101]

Hello,
I want to use the ADC pins of ATmega328 as digital outputs and inputs. Do I need to turn off the ADC using the ADEN bit? is there anything we have to do to use it as regular digital IO?

 

[KlausST]

Hi,

you don´t necessarily need turn off the ADC.
I´m not sure if it is turned on by defalut. It surely is written in the datasheet.

If I´m not mistaken there is the option to turn OFF the digital input section when a pin is used as pure analog input.
I´d need to read the datasheet, at least the ADC section.

Klaus

 

[fm101]

it is off by default from the datasheet

 

[KlausST]

Hi,

Which Atmega328 exactly are you using? There are different types with (slightly) different properties.

Klaus

 

[fm101]

ok problem solved nothing is required to do for using it as digital IO