DRV8889-Q1: Regarding circuit current

Hi Team 

 I recieved several question from customer. could you help following items?

How to cut the phase current when DRV8889 does not drive the stepping motor?

Is the way to cut the phase current  “DRVOFF” or “Sleep”?

For regulating current, which takes precedence, Full scale current or torque?

best regards

TATSU