How to backup data of RTC module MKE04?

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How to backup data of RTC module MKE04?

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chunghusttdh
Contributor I

When I set date and time, the RTC module running normally, but I reset MCU, date and time also reset :smileysad:. Let me ask if I have something missing?? Thank you!

 

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miduo
NXP Employee
NXP Employee

Hello,

You did not mention that what your RTC configuration. Actually MKE04 has no backup power domain and requires the processor to remain powered in a very low leakage state, usually using a low power 32Khz oscillator rather than crystal. That is to say you need to use a low leakage mode instead of power off to keep the processor powered that will keep the RTC data.

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chunghusttdh
Contributor I

help me :smileysad: 

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