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AD9789 Default SPI setting

Question asked by Tat on Aug 16, 2011
Latest reply on Aug 22, 2011 by danf

I have a question regarding AD9789 SPI register setting.

 

The data sheet mentions "DCO Frequency Register (Address 0x22), ONES[3:0] is "These bit always read back 1111."" on page34.

However, these register values showed "0000" at default.(using SPI software)

I would like to know why these were  "0000" at default? And we must change 0000 to 1111?

 

Thanks,

Tat

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