DRV8881: XVREF's Absolute maximum rating

Hi all

Would you mind if we ask DRV8881?

Could you let us know XVREF's Absolute maximum rating?
The datasheet shows follows;


Does it mean V3P3(with 3.3-V LDO turns on)+0.5V?
Or, does it mean -0.3V to 3.8V?

As the background of this question, our customer would like to add the voltage to XVREF using CPU's DAC.
So, if  XVREF's Absolute maximum rating are V3P3+0.5V, it may be prohibited to insert voltage in case of V3P3 off(Sleep mode).

Kind regards,

Hirotaka Matsumoto