I have found that the MA782 does not echo back the value written to the REF (#10) register the very first time I write the REF register. Subsequent writes to REF (using the exact same values) always succeed. Because I don’t have an endless supply of brand new never programmed chips, I tried writing REF back to zero to see if it would cause the write error to happen again the next time I write a non-zero REF value, and it does reproduce the write error. My solution is to verify the value returned in the write operation, if it is not what I wrote then I repeat the exact same REF write command, and it always succeeds on the write retry. Can you verify this behavior I am seeing?