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TMS320F28388D: How to set up synchronization of 2 processors.

Part Number: TMS320F28388D
Other Parts Discussed in Thread: SYSCONFIG

Good afternoon.
I am using TMS 320F 28388.
.

I am synchronizing 2 PWMs in different processors.
The image is a screenshot of the oscilloscope.

Channel 2 shows the sync pulse. It synchronizes the PWM of the processor. This pulse goes to XINPUT -> PWM 2 DC -> SYNC -> TEM BASE .
Why is the reaction only on the falling edge of the pulse?
How to make it so that the synchronization is from the rising edge?