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ADS4249: Register read error

Part Number: ADS4249

Hello,

My customer is testing reading and writing the ADS4249 registers on a board they designed.

Other registers are read normally with the set values.

Below, 0x4A and 0x58 both wrote 0x01, but board 1 was read as 0x41/0x01 and board 2 as 0xD1/0x81.
Is it normal for these two registers to be read differently on each device? What are the definitions of bit values other than Bit0?

Thank you.

JH