DRV8834: Timing requirements of twake

Part Number:DRV8834

Hi,

Now  I am study DRV8834 for stepper motor.

But, I am confused about the Maximum wake up time.

It define the wake up time as nSLEEP inactive to STEP in datasheet and it's Maximum value is 1ms.

Does it mean the STEP should be start after or under 1ms when nSLEEP pin turn high? 

If the STEP need 1ms delay at least, the twake should be minimum value not Maximum .

Please help to solve my confusion.

Thanks.