DRV8711 Raise current to 1A

Hi,

I'm using DRV8711, 1/64 micro step and I want to raise the current to 1A

here is the equation in the drv8711 manual, 

I = (2.75V * TORQUE) / (256 * ISGAIN *RISENSE) = 1A

I tried several combination of isgain and torque: 

isgain = 20, torque = 186 (decimal)

isgain = 10, torque = 93 (decimal)

isgain = 5, torque = 47 (decimal)

but the current is still less 0.1A 

(I can see the current changes when I use 1/256)

Here're my settings for other registers:

Dtime: 850 ns

SMPLTH: 100us

TOFF: 0X28

TBLANK: 0X00

ABT: DISABLE

TDECAY: 0X14

DECMOD: 101

SDTHR: 0X3C

SDCNT: 00

VDIV:10

OCPTH: 00

OCPDEG:00

TDRIVEN: 11

TDRIVENP: 11

IDRIVEN: 00

IDRIVEP: 00

Also the sense resistance for Boost drv8711 is 0.1 ohms, right?

Since there are two 0.05 ohms resisters in series.

Thanks,

Esme