UCD3138: UCD3138 SAMPLE_TRIG_2 AND EVENT_UP_SEL

Hi Sir:
 We're using DPWM0 in multi mode;
could we use it in below way for DPWM0?
1\set SAMPLE_TRIG_1 and use its over sampling of 2 samples;
2\set EVENT_UP_SEL as 3 : At both End of Period and at time set by sample trigger 2
3\set SAMPLE_TRIG_2 as PERIOD/2
4\set SAMPLE_TRIG_2_EN 0 to disable TRIG_2's sample trigger!!!
so we could do event update at the end of period of DPWM0 and at PERIOD/2 of DPWM0 without triggering CLA at SAMPLE_TRIG_2?
THANKS A LOT