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AT328p-au GPIO pins multiplexing

Thread starter #1
i want to know if a can multiplex gpio pins. i have to add air quality sensor, in my device but MCU dont have GPIOs left. Please recommend solution.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
#5
As Pommie, says, it all depends on what the other pins are doing, you may well be able to better utilise what you've got.

Even if you can't, you can't multiplex a single pin, you need multiple pins to feed the multiplexer/port expander - so you would need to move some of your existing I/O's to the multiplexed connections.
 

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