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AD7124-8 write error

AD7124-8 IC doesn't let me write the register values i want on the device. For example I can't start the device on full power mode or I can't change the AINM pins on the channels, it returns back to default AIN0 when i read back. 

I can read the ID register correctly or I can read the adc values on default register states and error register value is 0x0000803  

What may cause this problem and how to solve it? 

read bits were reversed for eror
[edited by: ddere at 6:55 AM (GMT -5) on 26 Nov 2021]