S32K344 LPCMP

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S32K344 LPCMP

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Neo1096
Contributor I

I have a question about cmp in round robin mode. The round robin clock, RTC_CLK, high frequency limit mainly depends on facts:DAC initialization time. fRCLK < 63 / Tinitialization (it's 30us in S32K344). so RCLK should be smaller than 2.1MHz.

But, RCLK has four clock resource: SXOSC(32.768kHz). SIRC(32kHz), FIRC(the smallest value is 3MHz),FXOSC(the smallest value is 8MHz).

So, How could i get 2MHz?

i want to use cmp to detect the over current of 6 channels. but the RCLK is too long as i understand. Do I have to use an external comparator? 

Neo1096_0-1713165039619.png

Neo1096_2-1713165315677.png

 

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danielmartynek
NXP TechSupport
NXP TechSupport

Hi @Neo1096,

This is specified in the RM.

danielmartynek_0-1713792811153.png

 

I don't know the use case so I can't help with that.

 

Regards,

Daniel

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