common input clock for 3 counters in XMC1100

Hi,

I would like to use one of the four counters in the XMC1100 to generate a common input clock for the other three counters.
All four four should eventually run in PWM-mode. The reason is that the input clock should vary by changing the compare value through SW. The other three should output PWM-signals each at different frequency.
This way the frequency of the three PWM outputs be can synchronously be ramped up and down while maintaining puls width.

thanks