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TPS92662A-Q1: Review customer schemetic

Part Number: TPS92662A-Q1

Hi Experts,

I've reviewed customers schemetic. But I have some question on several points.


1. SCL = low, SDA = High => so, it will have 100% duty at POR (LED on). Is it right?

2. DGND is not connected with GND, but connected with Vin.  Is it ok?

3. LED3 : "Connect to anode of LED3. Connect 10-nF capacitor to GND."  Dose this sentence mean anode or GND with cap? 

Or should be connected to anode and also GND through 10nF cap ?

And from the picture below, "Buck regulator output" is connected to CPP&LED line. Which case it should be?

4. XTAL0 : It is difficult to understand this pin's role. Why this pin is needed?



Thank you.