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TPS65910 VRTC using

Other Parts Discussed in Thread: TPS65910

Hello,

In the TPS65910 datasheet (TPS65910.pdf) there are words:

"For details on VRTC, refer to TPS65910 Application Note, Literature Number TBD"

I failed to find among app notes anything on the subject and therefore could you please suggest:

1) why in the ARM MPU AM335X Base Board (TI   am335x_gpevm_15x15baseboard_schematic_rev1_1a.pdf   document, page #5)

the VRTC is not used for , but a separate LDO (TPS71718, U5) is used, instead, for powering reset circuitry and a Sitara VDDS_RTC as well?

2) is anywhere any document available on VRTC details clarification or it is still TBD? 

Thanks,

Sergei