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AD9826 operation

Hi team

I have a question as below.

1. W/R is currently being performed through the serial interface (tested from 5Mhz to 100kHz), and each reboot reads different values.
I'm reading both 0 and 1, and they're both random. Is there a separate way to write and read?

2. Because we use only one channel,
The setting at 0 is:
D7:4V, D6:Enable, D5:0ff, D4:1, D3:4V, D2:Off, D1:0, D0:0,
The number one setting is:
D7:R-G-B, D6:RED, D5:Off, D4:Off, below zero.
You are about to set it up. Is this the right setting?