s32k396 rtd mcal pwm driver system clock frequency does not match my expectation

[Mooang]

I set mcal pwm configuration like this.
You know, s32k396 core clock frequency is 160Mhz.
And I set default perioud 8000 ticks like a picture.
I checked Pwm frequency with oscilloscope.
Frequency is 6.023 Khz(????).
Its weird. Core clock == (8000*6023 == 48Mhz??)hmm... Anybody know why this happened?

I didn't set any prescaler.(48Mhz cant be made with any prescaler with 160Mhz).

[Mooang · Accepted solution]

Lol, I didn't set PLL 

You guys do not dumb thing like me

[Mooang]

I checked core clock in oscilloscope. its 48Mhz....
why??