S32K14x frequency requirement

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S32K14x frequency requirement

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Mohit_Manvar
Contributor III

Hello experts,

I am using the S32K342EVB board. In which I am using FTM_PWM for PWM output generation. My Core frequency is 48 Mhz.

I want 6.144MHz frequency but getting 6.87MHz.

below is reference of configuration.

Mohit_Manvar_1-1698066730232.pngMohit_Manvar_2-1698066759466.png

 

Help me to get required frequency.

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VaneB
NXP TechSupport
NXP TechSupport

Hi @Mohit_Manvar 

Could you share your clock configurations and an image of your PWM showing the frequency? 

 

B.R.

VaneB

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Mohit_Manvar
Contributor III

Hi @VaneB 

 

please find screenshots below:

Clock Configuration

Mohit_Manvar_0-1698292594104.png

Frequency snapshot

Mohit_Manvar_1-1698292695967.png

 

 

Note: I am using S32 design studio for developing pwm freq.

peripheral -> FTM_PWM

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VaneB
NXP TechSupport
NXP TechSupport

Hi @Mohit_Manvar 

If you decrease the expected frequency, it has the same behavior? 

Also, how are you measuring the signal? 

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Mohit_Manvar
Contributor III

Hello @VaneB,

Yes, I'm facing same issue on decreasing frequency.

I'm not getting exact frequency as per input.

 

I'm measuring output via oscilloscope by connecting on Headers of eval board.

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VaneB
NXP TechSupport
NXP TechSupport

Hi @Mohit_Manvar 

Could you share images of your tests? 

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