RE: DRV8711: The stall detecting voltage by setting SDTHR

Hi Shimizu-san,

How much detecting voltage does SDTHR=0x40 mean?
and
How much detecting voltage does SDTHR=0x20 mean?

Please refer to Figure 15 of the datasheet. SDTHR sets a percentage of 1.8V to the negative input of the comparator. To determine the voltage use the equation:

SDTHR_DAC_out = (1.8V * SDTHR)/255
For 0x40, SDTHR_DAC_out = 0.45V
For 0x20, SDTHR_DAC_out = 0.225V

VDIV can be use to adjust the positive input to the comparator.

The BEMF can be observed externally to determine the desired settings. Please see www.ti.com/.../slva632.pdf for more information.