Ask the pwm frequency problem of s32k344

[drfrefw123]

Here is my configuration in EB tresos

clock is 160M

The theoretical result should be：frequency = 160M/4000 = 40k,But the actual result is around 12k

[danielmartynek]

Hi @drfrefw123,

Is the core clock really 160MHz?

Can you check the configuration on the HW or measure it at CLKOUT?

48MHz / 4000 = 12KHz.

CORE_CLK = 48MHz is the default configuration that uses FIRC.

Regards,

Daniel

[drfrefw123]

hi,I have used the PLL clock as the core clock, is there any other configuration?

[danielmartynek]

Can you check the MC_CGM registers to be sure the CORE_CLK is correctly set?

Also, all the clocks should be configured precisely to one of the Options:

RM, rev.8 Section 24.7.2 System clocking configurations.

Thank you,

Daniel