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PCM1864: For application of PCM1864 EVM

Lee, Sam
Expert 5475 points
Part Number: PCM1864
Other Parts Discussed in Thread: , PCM9211

Hi team,

I've received the following questions regarding PCM1864EVM. Can you please answer the questions?

Configuration : 1KHz (1WATT) SINE WAVE input -> PCM1864EVM -> SPDIF output  -> to AMP

-. Can PCM1864EVM support the configuration?

-. Is the analog input a BALANCE type?

-. Is it okay to use coaxial cable for SPDIF output?

Thanks,

Sam Lee

  • 0
    TI__Expert 5645 points

    Hi Sam,

    PCM186x EVM can support this configuration. If you want to run the PCM1864 as MASTER, I would recommend configuring the EVM in Mode 1 using PPC2 GUI. Below is the screenshot of how the configuration works...PCM9211 is used to convert I2S output to S/PDIF but we only support optical connector on the EVM.

    PCM186x can be configured for both SE or Differential Inputs using the PPC2 GUI or configuring the registers.

    Thanks & Best regards,

    Ravi

  • 0 in reply to Ravi Patil
    TI__Expert 5475 points
    Hi Ravi,

    Thank you for your answer. I ask one more question.

    To use a coaxial cable, is it okay if they try to connect the wires to the pad of output optical connector after stripping the coaxial cable?

    Thanks,
    Sam Lee
  • 0 in reply to Lee, Sam
    TI__Expert 5475 points
    Hi team,

    Can you please answer avobe question? If it's not available, can you recommend any way to transmit SPDIF output using a coaxial cable?

    Thanks,
    Sam Lee
  • 0 in reply to Lee, Sam
    TI__Expert 5645 points

    Sam,

    You should be able to get this working w the above approach. You can take the SPDIF_OUT from PCM9211 on the EVM and connect to coax cable for your application. Thanks.


    Best regards,
    Ravi

  • 0 in reply to Ravi Patil
    Genius 3945 points
    Ravi, this EVM comes with something called the USB-I2X -- what is this, exactly?
  • 0 in reply to Andy Peters
    TI__Expert 5645 points

    Hi Andy,

    The USB to I2X board is board that gets shipped with PCM186x and the EVM can be controlled though the use of the USB using the included USB-I2X board. The USB-I2X board has following functions -

    • connects to a PC via USB and provides digital control signals to the EVM board via I2C
    • provide serial digital audio in and out from the PC to the EVM through an I2S interface
    • supplies all of the power required for the EVM through USB

    Did you order an EVM and not receive the USB-I2X board? if you are designing your own board, you will have your host processor to configure the part w all the required I2C writes and you will not need the same...

    Hope this clarifies your question. Thanks.

    Best regards,
    Ravi

  • 0 in reply to Ravi Patil
    Genius 3945 points

    Hi, Ravi,

    I didn't order an EVM. I happened to see this thread and saw that the EVM included this USB-to-I2X board and thought that such a little board is ideal for my own test use. I mean, if it was $20 it's a no-brainer.

    I also wondered what parts it used and whether source code for it was available.

    Thanks!