DRV8308: Register for more low jitter of FG signal at using Click frequency mode

Part Number:DRV8308

Hi,

My customer is tuning DRV8308.
Condition is VM=24V, Click frequency mode, 3-hall 120 mode(BASIC=1) and FG frequency=600Hz(FGSEL=01).

Motor speed and motion is good.
And I want to do tuning for more low jitter of FG signal.
Could you let me know register names which should be more adjusted for more low jitter of FG signal, please?

Best regards,
Shimizu