MSP430F247: Pin's state until the internal pull-up/down becomes valid

Hi  HaTa,

after power up and reset release the port pins Px.y are in input; therefore show high impedance.

For each port pin an equivalent schemics is shown in the data sheet.

As you can see above this group of pins shows a small box called "Bus Keeper". This is a very week positive feedback driver which avoids that the input may be floating and cause unwanted signal changes. The statement high impedance is therefore not seen to be at 1MegOhms or above; it is rather between 30kOhms and 300kOhms.

Pull up and pull down is programmed by your code.   Between  Reset release and your IO-setting the Port pins are in inputs state as described.

have a nice day

     Johann