I'm using AD9910.
I'm setting register by serial mode,
and I set freq. by parallel port.
I want to use OSK pin.
I setted register related to OSK function like following,
CFR1(23) [Manual OSK external control] : 1
CFR1(9) [OSK Enable] : 1
CFR1(8) [select Auto OSK] : 0(means Manual mode)
(1) Is there another register to use OSK function and pin(No. 60)?
(2) If it is right, I think system will be work like following,
After setting frequency,
If I make OSK pin to Logic High, the output will be come.
If I make OSK pin to Logic Low, the output does not seem.
But here's a problem,
If I make OSK pin to Logic High first time, then the output is ok.
then I make OSK pin to Logic Low, then the output does not out.(so, it is ok)
again, then I make OSK pin to Logic High, the output does not out.
Please give me some advice.