Hi hmani
Thank's for your reply.
1. I verify the source by measuring with Lutron Digital KWH Meter. The load is 18W flourescent bulb, Lutron shows 19W and pF is 0.6. I use CT current sensor with Rb 51 ohms. Unfortunately i don't have osciloscope to see the signals.
2. Yes I have set PCF_x_COEFF to 0x400CA4.
3. ANGLEx register seems not stabil. I read this register every second and shows 225, 4563, 220, 219, 223, 4706, 4589, 4777, 228, 340, 220, 4818.
Regards
Lukman