We have developed new PCB with help of reference circuit for using ADE7878 & 7880. we assembled ADE7878 chip and required supporting components and check three channel voltage & current waveform in oscilloscope, its showing expected.
After power on the PCB, VDD pin(26) showing 3.3V in multi meter, But no voltage showing in AVDD, DVDD & REF IN/OUT pin. (Actally its expected 2.5v & 1.2V)
Also not able communicate with our CPU through SPI coomunication. we are using 16.384MHz crystal and internal ref.
could you please suggest to resolve the issue.