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Thread: PCM1802 and FSYNC

  1. #1

    PCM1802 and FSYNC

    Hi,

    I have two types of ADC boards, one is PCM1808, another one is PCM1802.

    PCM1808 connection is fairly simple (thanks to JayShoe who shared the info in another thread).

    But PCM1802 has one more pin called FSYNC (http://www.ti.com/lit/ds/symlink/pcm1802.pdf). Is it possible to provide it from Teensy 3.6?

    Thanks.

  2. #2
    Senior Member
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    Hi hoho,

    Not every connection needs to be hooked up... A quick look at the datasheet didn't help me figure out exactly what this pin does. Does it work without it? I haven't seen this on a chip yet and I've looked at lots of them.

    PS - I just finished design of a PCM5242 and PCM1865 I2S board that I'll be trying to get work with the Teensy... Not exactly sure what you are looking for, but this board might be helpful for you once it's done. It's currently at the pick and place shop being made so I can test it. Once I have more to report I'll be creating a new post like I had done with the project with the single ended DAC/ADC chips.

    Jay

  3. #3
    Senior Member PaulStoffregen's Avatar
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    Quick followup on this old thread. Connect FSYNC to 3.3V.

    Today I wrote a blog with detailed instructions for connecting PCM1802 to Teensy, including a mod needed for a design flaw in the commonly available PCM1802 breakout boards.

    https://www.pjrc.com/pcm1802-breakout-board-needs-hack/

  4. #4
    Junior Member
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    Quote Originally Posted by PaulStoffregen View Post
    Quick followup on this old thread. Connect FSYNC to 3.3V.

    Today I wrote a blog with detailed instructions for connecting PCM1802 to Teensy, including a mod needed for a design flaw in the commonly available PCM1802 breakout boards.

    https://www.pjrc.com/pcm1802-breakout-board-needs-hack/
    Just a minor note for your PCM1802 hack page: The board silk print is PDW (for /PDWN) not POW so they can probably be let of that particular hook!

    As for the lack of +3.3 on the pad links, very strange how that error has proliferated for so long!

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