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SRC4194: Master Clock Explanation

Part Number: SRC4194
Other Parts Discussed in Thread: DIT4192,

Do we have any application notes on how to drive the master clock pin of the SRC4197?

Do you have a check list that would help to make sure that the proper clocks were chosen?

There really are no pictures of the master clock, thus the questions.

The data sheet on the SCR4194EVM adds this:

The DIT4192 transmitters (U7 and U17) have additional configuration switches, summarized in Table 3−4 and Table 3−5. For the clock divider, the corresponding control pins need to be set dependent upon the incoming master clock (MCLK) and output sampling rates, fSout.

The master clock (MCLK) rate is set by either reference clock RCKIA or RCKIB, or by the corresponding DIT CLOCK input at connector J4 or J9 (dependent upon the clock configuration; see Figure 3−3 and Figure 3−4).

Please send additional information so that I can help my customer set up the master clock to the SCR4194 correctly.

Thanks for your help with this!

Richard Elmquist

  • Hi Richard,

    As far as the SRC4194 EVM goes, the EVM was designed long time ago and it has DIT/DIR/PLL to configure the input and the output clock/data for the SRC. Hence we do have different configuration for the clock/data sources for input/output serial interface.

    All the details are outlined in the User's Guide for this EVM which you have referred to in the post.

    If you can mention the exact use case, I can try to work on it on our end and provide you the settings. Otherwise, the User's Guide at the below link has all the details - 

    Best regards.
    Ravi

  • Ravi,
    I will send this to the customer an if he has any further questions I will post them for you to look at.
    Thanks for your help with this!
    Richard Elmquist