PWM module in FRDM-K22F does not respond to period less than 11ms


I am using the FRDM-K22F to generate PWM on pin D6 and the same pin is used as a trigger to an external interrupt. I tried to generate the pulse at period less than 11 milli seconds and I see that there is no pulse generated at all. Since the microcontroller clock source is a 32kHz oscillator, ideally shouldn’t I be able to generate pulses at that frequency?

Any leads on the same would be really helpful. Thanks in advance.