AnsweredAssumed Answered

Question about AD9910 OSK function.

Question asked by JongWon on Feb 7, 2013
Latest reply on Feb 13, 2013 by KIDcharles

Hello.

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.

 

Thank you.

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