RTC issue

[durgeshk]

Hi,

I'm working on MKL16Z256vlh4 uC , it does not have dedicated vbat pin so how to provide backup voltage when main supply goes off?

Regards 

Durgesh

[kerryzhou]

Hi Durgesh,

   I agree with Mark, you can refer to the FRDM-KL26 board, just connect the backup voltage to the VDD.

Wish it helps you!

Have a great day,
Kerry

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[mjbcswitzerland]

Hi Durgesh

The KL parts don't have battery backup so you need to use a low leakage mode instead and keep the processor powered. See the following for some more details: http://www.utasker.com/kinetis/KL_RTC.html

Regards

Mark

Kinetis: http://www.utasker.com/kinetis.html
Kinetis KL25, KL26, KL27, KL28:
- http://http://www.utasker.com/kinetis/FRDM-KL25Z.html
- http://www.utasker.com/kinetis/TWR-KL25Z48M.html
- http://www.utasker.com/kinetis/FRDM-KL26Z.html
- http://www.utasker.com/kinetis/TEENSY_LC.html
- http://www.utasker.com/kinetis/FRDM-KL27Z.html
- http://www.utasker.com/kinetis/Capuccino-KL27.html
- http://www.utasker.com/kinetis/FRDM-KL28Z.html
RTC and time keeping: http://www.utasker.com/docs/uTasker/uTasker_Time.pdf

Free Open Source solution: https://github.com/uTasker/uTasker-Kinetis
Working project in 15 minutes video: https://youtu.be/K8ScSgpgQ6M

Professional Kinetis support, one-on-one training and complete fast-track project solutions: http://www.utasker.com/support.html