TMS320F28388D: About SDFM settings

Hi,

I am testing the following sample program.

C:\ti\c2000\C2000Ware_4_01_00_00\driverlib\f2838x\examples\c28x\sdfm\sdfm_ex6_FIFO_freeze_claread.c

I am testing the SDFM with 3.3V on SD1_D1 and 20MHz PWM on SD1_C1.

The conversion results are stored in a 5-stage FIFO, but since the SDFM is reset each time, the first two conversion results are incorrect. (Because it is a Sinc3 filter)
If the integrator is not reset, I expect to get the following result. 

Is there a setting for SDFM to get results like this?

Or do I have to discard the first two data each time I use SDFM with a servo?

Best regards,
Sasaki