Dear ADI experts,
I have been working on the auto clear of the accumulator by a change of a profile pin for a couple of days now. The clearing of the phase works well after a high pulse on the IO_Update pin, but not on changes of a profile pin. I really checked timing w.r.t. sync clock, SPI communication and read the data sheet multiple times. Still no success.
Now I found a remark in the following post
"In most of ADI's DDSs, a profile change is equivalent to issuing an IO_UPDATE, however not in the multi-channel DDS (AD9958 or AD9959). Page 27 under Clear and Release Bits is in error, only the IO_UPDATE does the clearing, not a profile pin change."
The AD9911 looks quite similar to AD9959. Is clearing the phase accumulator by profile pin change not possible for the AD9911, too??
Could you please correct the data sheet in that case?!
Dipl.-Ing. Sven Probst.
[edited by: swapro at 2:52 PM (GMT -5) on 14 Jan 2021]