Slave PWM sync with master clock

[Kranti]

Is there a way to access the lower level clock which a connected slave uses to stay in sync with the master. We want to use this to keep our PWM in sync. We are looking for 8 connected slaves to be in sync and generated a PWM signal. What is the best way to implement this?

Thank you,

[Kranti]

We are looking for around 100µs variation between master and slave. With both Master and Slave generating the PWM, need to keep the variation below 100µs.