The auto-increment statement on pg. 21 is incorrect.
During write the address pointer decrements.
During read the address pointer does not move.
AD9106
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The AD9106 TxDAC® and waveform generator is a high performance, quad digital-to-analog converter (DAC) integrating on-chip pattern memory for complex waveform...
Datasheet
AD9106 on Analog.com
The auto-increment statement on pg. 21 is incorrect.
During write the address pointer decrements.
During read the address pointer does not move.