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ADAU1463 Schematic review

Hello,

Can I please get a schematic check on the attached ADAU1463 schematic snippet?

I intend to have IN0 be clock slave, IN1 be clock master, OUT0 clock master, and then a lot of MP pin usage.

I also intend to have I2C_M mode for both EEPROM and to control external DAC configuration settings.

  • Is there a SigmaStudio example of controlling external I2C device somewhere I can take a look at?
  • Am I correct in thinking that I will be able to program the I2C eeprom thru the ADAU1463 using USBi & SigmaStudio?
  • Please check the way I hooked SELFBOOT to USBi header
  • Any issue branching CLKOUT thru two 33ohm resistors to feed two different devices?

Thanks!

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  • Hello JMJEngineeringConsulting

    If C70 is a ceramic cap, Then you will need around a 0.5 ohm resistor in series with the cap. 0.47 is a good standard value and it is there to simulate the ESR of an electrolytic cap. 

    I would suggest you use a Reset Generator to give the DSP a good clean reset after plenty of time for supplies to settle. This is not an absolute requirement but it does help to prevent startup issues. 

    The rest looks fine. I like what you did with the Selfboot pin. 

    Your questions:

    Is there a SigmaStudio example of controlling external I2C device somewhere I can take a look at?

    There are some examples of I2C control on the forum but we are working on a good example all in one place. 

    Am I correct in thinking that I will be able to program the I2C eeprom thru the ADAU1463 using USBi & SigmaStudio?

    Yes, you can program the EEPROM through the DSP using SigmaStudio. 

    Please check the way I hooked SELFBOOT to USBi header

    Yes, that looks good. It seems to me that will work fine. FYI, there is a way to shut off the 5V on the USBi when it is plugged in. Might be handy when working on the product development so you would not have to remove the USBi connector to test it. I could provide details if you like. 

    Any issue branching CLKOUT thru two 33ohm resistors to feed two different devices?

    Most likely not. I assume the lines are not going super far? As in off the PCB. The CLKOUT pin does have the ability to adjust the drive strength via a register if you need it. 

    Dave T

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