Unused inputs on 8M2?


Senior Member
I'm getting confused! I have 2 unused inputs on an 8M2 but I understand thats its bad practice just to leave them floating. Some posts suggests toggling unused pins as outputs but these can only be used as inputs on the 8M2 or connecting to ground via a 10k resistor.

Can I use the pullup command to set them high and how do I know if its working?



It is not mandatory to tie unused inputs high or low. I never do (except the SerialIn pin).

If minimum power consumption is the goal then yes - there have been past threads on this topic.

If you were to use the PULLUP command you could always as a test read the input and SERTXD the results to the PE terminal window to verify it is doing what you intend.