DRV8834: Stepping format

Part Number:DRV8834

Hi team,

In the datasheet table 3: stepping format you can see 1/4 step M1, M0 is 0, Z.

For M0 high Z we can let the pin floating or let MCU GPIO pin which connected to M0 is input.

But for some application consideration, cannot let M0 floating.

Set M1=0 and MCU GPIO pin which connected to M0 is input but cannot for 1/4 step.

Is there any we missed? Or what's the internal impedance for M0?

Thank you!