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KL26Z & RTC

Question asked by Simonato Umberto on May 10, 2017
Latest reply on May 10, 2017 by Hui_Ma

I use

MKL26Z256VLL4 micro -  clock 8Mhz

I use  as RTC_CLKIN (pin PTC1) the output of pin PTC3

I set MGGIRCLK with souce 32KHz IRC


As you can see in Clock and RTC SET 

 

I have a RTC time error - about 2 minutes x day

 

I see that PTC3 output a 32898 hz signal

instaead of waiting 32768 hz. (see RTCinput.jpg)

 

I have tried to adjust this signal 

changing the value of  slow internal reference clock but no result

 

Can you give me some support?

 

Thanks

 

Umberto

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