No Master Clock ADAU1442
Hello,
I'm working with the ADAU1442. I have developed my own prototype DSP_Board with the ADAU1442. See the PDF.
Everything was working but suddenly the Master Clock doesn't work. So there is no frequency on XTALO and XTALI. Before there was a frequency of 12.288MHz. Also the BCLK-freq=3MHz and a LRCLK-freq=48kHz were correct, like my adjustment.
And now there are only the 3.3V at CLKOUT, BCLK and LRCLK. At the Pins XTALO and XTALI there are 0V.
I know I forgot in my layout the 100ohm damping resistor on XTALO. But I think thats not the problem because it worked for several hours.
Is that a sign that the ADAU1442 is defect?
Is there a certain way how to check if the ADAU1442 is defect or not?
I would be thankful for any type of help!
Greetings Lou
Hi Lou,
I believe I responded to you or your colleague about this issue via our support email system. I think the lack of the 100 ohm damping resistor could result in overdrive on the cystal oscillator, which could eventually lead to a failure in the pad. Please try replacing the device and including the 100 ohm resistor in the design and let me know if the problem persists.
This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.
Thank you,
EZ Admin
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