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DAC8734: Issues reading the default values from the command register

Part Number: DAC8734

Hello,

I am struggling with the following problem. I want to read back the default values of the command register, but it seems, that the respond of the DAC is incorrect.

The uC is sending: 0x80XXXX for the read operation of the desired register (command register). To shift the data out a NOP with 0x00XXXX is written. In the datasheet on page 26 it written the default value of the command register is: 0x033C. But at SDO you can see 0x3C and not 0x033C. This read out happens without writing anything before into the register, how is that behavior possible?

The implementation of these DACs works fine as long you don't read back some data, which indicates for me, that we don't have a design or implementation error.

Kind regards,

HD