I have some questions on phase angle measurement:
1. Should I read angle register when the phase voltage zero crossing event occurred? Or it doesn't matter.
2. Upon the data sheet, for the angle register, 1 LSB presents 3.90625 us. It is independent from the line voltage frequency, is it righ?
3. Can I change the ANGLESEL bits setting dynamically (any time) during the operation? Or must reset the ADE7880 chip after the change? If I could, is there any settling time after the change?
Thank you very much for the help.