Hi there!

You can pull-up P0 pins (since they are open-drain) with 10K resistors and use them as regular I/Os.

Connect one end of a resistor to a port pin and the other end to Vcc (the supply voltage, +5V for e.g.). Pull-up the entire port (or the no. of pins you want to use for I/Os) and it will work.

Pull-up resistor value can vary as per the requirement.

Its data-sheet / app-notes will also guide you.

Regards
Aman