TPS62801: TPS62801 function confirm

Hi,

TPS62801 VSEL/MODE pin is multi function

We can use external resistor to select output voltage(16 selectable Vout).

After power up (VSEL→MODE), the pin is configured as an input for Mode Selection.

Low level at this pin selects "Power Save Mode" operation, and a high level selects forced "PWM" operation.

It's means we must use one GPIO to control which mode do we want?

If we don't use GPIO to control high/low, after boot is low level (Power Save Mode)?

My application is : Vout 1.0V , Forced PWM operation.

Thanks!!