ADE7880-I2C communication

Hello,

I am designing firmware for ADE7880. I use I2C and HSDC interfaces. I am using EVAL board with another MCU, power mode=NORMAL, no load connected inputs.

I configure HSDC_CFG, CONFIG2, CONFIG registers and i start DSP with I2C interface without any problem. But, i cant write HX,HY,HZ registers. I always read 00 regardless of what i am writing. The condition is same as for Hconfig register.

Is there any dependency condition about harmonic engine registers? Shall i make another configuration to write HX,HY,HX?

Thank you for your attention and best regard