The AD9106 TxDAC® and waveform generator is a high performance, quad digital-to-analog converter (DAC) integrating on-chip pattern memory for complex waveform...
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.
It's been two weeks... What is going on?