Used pins

[Daniel Reisfeld]

Hi,

It seems to me that unused GPIO pins can stay float. However, earlier questions made me less confident. 

Is firmware setting is enough?

Thanks,

Daniel

[RK]

Unused pins can float. The default works fine for that. In a finished and released product good engineering practice would be to tie unused pins to ground and explicitly set them to high impedence (even though that is the default). The defaults work fine but when you're done with a design it's good practice to tie every pin somewhere and explicitly initialise it 

[Daniel Reisfeld]

Thanks! Daniel