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Altera_Forum's avatar
Altera_Forum
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15 years ago

Question regarding wm8731 audio on DE2-70

I have a question regarding the audio codec on the DE2-70 board. How is it possible to generate the proper clock frequency for the WM8731 codec from the 50MHz or 28.63MHz on-board oscillators? ...
Altera_Forum's avatar
Altera_Forum
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15 years ago

Thanks a lot! So I think there was a bit of information that I was missing. Your design actually generates an exact 18MHz clock for the codec, which is not the precise 18.432MHz clock that the wm8731 datasheet says that it requires. So I guess what you're saying is that you don't absolutely need the exact 18.432MHz clock rate. Is that a correct interpretation? I was thinking if you didn't have the exact clock rate then you would hear all types of distortion - that's not the case?

Thanks for your help!

Jonathon