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How to write successfully user data to RAM in AD9957

Question asked by bsalski on Dec 5, 2016
Latest reply on Dec 12, 2016 by KennyG

Hi,

It seems that this issue has already been raised at this forum. Unfortunately, even though I tried to follow exactly the suggested steps I couldn't get the data successfully delivered to the memory in AD9957. In particular, I'm not sure how to organize the sequence of signals during RAM loading. I tried as follows:

1. CS = low

2. Send RAM address (0x16)

3. Send N 32-bit words one after another (with I/O_Update issued after each of them)

4. CS = high

 

Sometimes, I see that the first bit is changed but all the other are unaffected by the above procedure.

 

I will appreciate any suggestions.

Bartek

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