TMS320F28377S: How to synchronizing the ePWM using the Digital Compare Submodule?

Hi,

I need three ePWM modules to be synchronized by three different external triggers coming from GPIO pins or analog comparator outputs. I think I need to use the DC module for this, as there are only two independent signals for all ePWM modules. (EXTSYNCIN1 and EXTSYNCIN2)