ADE7878 : Rms Problem


I'm using ADE7878 in my unit.

I have strange reading problem..Sometimes the contance of the RMS register (AIRMS, BVRMS etc) get unlogic value.

I try to locate the problem and I notice that I get in the RMS register another value for other register.

For exaple:

step 1: I keep reading the STATUS1 register to wait for the ZXA bit (cross zero)

step 2: I read the AVRMS

sometimes in the AVRMS I get the STATUS1 register.

I Also get values in the RMS register that has no logic..

I solved this problem by reading the same register 3 times , mask out the least 8 bits - and if they are all the same I accept the value.

Any other solution?



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