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Original question:

DRV8846: Autotune at Power Up

DRV8846: Autotune behavoir with ADEC='1' and DEC0='X', DEC1='X'

Bharath Patil23
Prodigy 70 points
Part Number: DRV8846


Hi,

If ADEC='1', DEC0='X', DEC1='X' when DRV8846 is woken up from sleep, does the driver go Autotune mode? 

Datasheet says different thing in different places. 

On page 18 - "To enable AutoTune mode, pull the ADEC pin to logic high and pull DEC0 and DEC1 pins to logic high" 

On page 3 in the description of ADEC - "Logic low sets decay modes by DEC0 and DEC1 pins; logic high – AutoTune operation is enabled"

Can you please confirm? Do DEC0 and DEC1 levels actually matter if one uses Autotune mode only?

Regards

Bharath

  • 0
    TI__Guru** 114905 points
    Hi Bharath,

    Page 3 description is stating that if AutoTune is not used (ADEC pin set to logic low), the decay modes are set by the DEC0 and DEC1 pins.

    If AutoTune is desired, set the ADEC pin to logic high. Page 18 clarifies that DEC0 and DEC1 are to be set to logic high when entering AutoTune.

    Yes, DEC0 and DEC1 do matter.