• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 411 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TLV320AIC1110: Does loss of MCLK affect I2C bus?

Dan Andersen
Genius 11460 points
Part Number: TLV320AIC1110


My customer is having problems with I2C communication and the AIC1110.  I notice this device has an automatic power down feature when loss of MCLK is detected.  Does this affect the I2C bus?  Can the customer gate the MCLK only when PCM is transmitted (and leave off otherwise)?  They are seeing I2C latchup issues..

Regards,

Dan 

  • 0
    TI__Mastermind 30220 points
    Hi Dan,

    I will look into this, but I can't guarantee I'll be able to gain much insight, This is a legacy device released circa year 2000, the design team is long gone, and the design files are archived.

    I do have an EVM for this device. Can you give me more details about the latch-up issues and how I could reproduce them?

    best regards,
    -Steve Wilson
  • 0 in reply to Steve-Wilson
    TI__Mastermind 30220 points
    Hello Dan,

    The design team has been very busy with new development and supporting newer devices.

    what I can say is that All of the newer TI codecs have separate onboard oscillators that run the I2C and other power supply management etc... so the I2C is not dependent on the MCLK. I assume this is the case with the TLV320AIC1110.
    I've tested the EVM without an MCLK, and the I2C bus still responds.

    best regards,
    -Steve Wilson