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Powering AM335X VDDS_RTC using TPS65910A31

I'm designing AM335X with TPS65910A31A1.

I don' t use the RTC features of AM335X(i,e RTC feature disable) , so I'm checking the following schematic check list.

This wiki describe that "VDDS_RTC" and "RTC_KALDO_ENn" terminals should be connected to "any AM335x 1.8 V power supply".

Can I connect these terminals to "VDIG1" of TPS65910A31A?  

Because TPS65910A31A VRTC  didn't work when connecting to the "VDDS_RTC" and "RTC_KALDO_ENn" terminals.

Best  Regards

Nao

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