28035使用HRPWM时如何使用同步信号

阅读28035资料时发现在使能HRPWM后不能使用硬件同步信号，使用后环路效果明显变差。由于使用场合是H桥（ePWM1\ePWM2\ePWM3\ePWM4)，目前运行几个小时未出现异常，但是始终觉得不使用同步信号不靠谱，求教各位达人该如何处理呢？

NOTE: When high-resolution period mode is enabled, an EPWMxSYNC pulse will introduce +/- 1-2
cycle jitter to the PWM (+/- 1 cycle in up-count mode and +/- 2 cycle in up-down count
mode). For this reason, TBCTL[SYNCOSEL] should not be set to 1 (CTR = 0 is
EPWMxSYNCO source) or 2 (CTR = CMPB is EPWMxSYNCO source). Otherwise the jitter
will occur on every PWM cycle with the synchronization pulse.
When TBCTL[SYNCOSEL] = 0 (EPWMxSYNCI is EPWMxSYNCO source), a software
synchronization pulse whould be issued only once during high-resolution period initialization.
If a software sync pulse is applied while the PWM is running, the jitter will appear on the
PWM output at the time of the sync pulse.