yes i have done a 555 at 100ns , and used the inverter and resister / cap arrangement to produce a 30ns time , with a about 200ns space between , other way i just use a powered xtl with buffer and programaable counter for speed changes in multipuls for the base xtl , but its not about how to make the pulse from other parts

i have used the 64mhz clockref out pin from these chips though an external buffer to clean up the waveform but i not sure if i can use that approch as an input for the hpwm and its control ?? and still get it to work