RTC clock issue on iMX6ULL

[rameshasp]

Dear sir/Madam,

Currently i am using imx6ull based custom board in this i am not getting real time in this i am using coin cell MS412FE-FL26E. 

When i measure voltage in Coin cell on the board it is showing 0.652V.

Please let me know is the above voltage is correct.?

Thanks & Regards,

Ramesha S P

[igorpadykov]

Hi Ramesha

processor rtc is powered by VDD_SNVS_IN (2.4v min.) described in

Table 10. Operating Ranges i.MX6ULL Datasheet
https://www.nxp.com/docs/en/data-sheet/IMX6ULLCEC.pdf

One can check hardware using Hardware Development Guide for the i.MX 6UltraLite Applications Processor
https://www.nxp.com/docs/en/user-guide/IMX6ULLHDG.pdf

Best regards
igor
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[rameshasp]

Hi Igor,

I have checked the voltage as expected. but still i am not getting real time on the console

 VDD_SNVS_3V0 3.02V (TP14)
VDD_SNVS_CAP_OUT 1.18V
VDD_COIN_3V 0.657V

Please let me know what needs to be check.

Thanks & Regards,

Ramesha S P

[igorpadykov]

Hi Ramesha

please try to reproduce issue on i.MX6ULL EVK with Demo Image

Linux Binary Demo Files - i.MX 6UltraLite, i.MX 6ULL, i.MX 7Dual

https://www.nxp.com/webapp/Download?colCode=L4.9.88_2.0.0_MX6UL7D&appType=license&location=null&Pare...

Best regards
igor