Dario Greggio wrote:
> Michael Watterson ha scritto:
>   
>> But are the week pullup always enabled on port D and B for inputs?
>>     
>
>
> no, and are there any for PORTD?
>   
Yes,
Port D has them as well as Port B
But re-reading the datasheet reveals that by default the pullups are off.
/RBPU turns on all port B pullups
/RDPU turns on all port D pullups

my tact switches are on port B and the LCD and FM TX are using Port D, 
so I can leave port D as it is and turn on pullups on port B



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