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AD9102 Configuration Register Values

Question asked by scn_cascodium on Feb 5, 2015
Latest reply on Feb 6, 2015 by scn_cascodium

I've been digging into the details of the configuration registers for the AD9102, and I've come up with a few questions.

 

There are several registers given values in the example1.regval file that either pertain to the AD9106 or aren't documented in the datasheets for either the AD9102 or AD9106. Is programming these registers important? Is there a reason they're included in the .regval file?

 

Some of the values in the .regval file write '1' into read only bits of certain registers. Is this important? Is there a reason to do it?

 

Finally, the description of the DAC_CST register seems weird. Table 35 indicates that the most significant 12 bits in the register represent "Most significant byte of DAC constant value." I'm not sure if only eight bits of the register can be used or if more than a byte is represented. Also, is there a default value for the least significant byte or least significant bits? I would assume that the 12 bits indicated are correct and that the final bits of the 14 bit value are zeros. Could someone confirm my assumption?

 

Thanks,

 

Sara

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