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USB communication errors with ADAU1442

Hello,

I am having problems with USB communications errors with the ADAU1442. The first download works correctly, subsequent downloads occasionally work but more often than not fail. Occasionally a download appears ok but is corrupt in some way.

I have the SCK and SDA pins pulled high with 2k2 resistors to 3V3. The only other device on the I2C bus is the self boot memory. All traces are gaurded and signal integrity looks fine.

Suggestions please?

Cheers

Ian.

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  • A reset of the sigma chip usually clears the problem.

    Does this mean that the problem you're seeing only happens when you first power up your board? Are you making sure that all of your supplies have settled and are the correct voltage before you start to boot the IC? You should also be sure that you are providing a clean reset signal to the ADAU1442 on power-up.

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  • A reset of the sigma chip usually clears the problem.

    Does this mean that the problem you're seeing only happens when you first power up your board? Are you making sure that all of your supplies have settled and are the correct voltage before you start to boot the IC? You should also be sure that you are providing a clean reset signal to the ADAU1442 on power-up.

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