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Thread: teensy audio board i2c question

  1. #1

    teensy audio board i2c question

    Does the board already have pull-up resistors on the i2c lines, or do I need to add them?
    Thanks!

  2. #2
    Senior Member
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    The I2C library uses the internal pull-ups in Teensy's processor - effectively plug and play.

  3. #3
    Senior Member PaulStoffregen's Avatar
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    The audio board has 2.2K resistors for SDA and SCL.


  4. #4
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    sorry, had a squiz at the circuit and just did not look at those (glaringly obvious) 2k2 resistors clear as crystal on the schematic - that I2C library enables the pullups on the I2C pins on the MCU tho doesn't it?

  5. #5
    Quote Originally Posted by lamikam View Post
    Does the board already have pull-up resistors on the i2c lines, or do I need to add them?
    Thanks!
    Thanks! I am not using with teensy board.

  6. #6
    Senior Member PaulStoffregen's Avatar
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    Quote Originally Posted by lamikam View Post
    I am not using with teensy board.
    Oh. I hope you'll post a photo at some point. So far I've never seen anyone use it with any other I2S device. I'm curious to see....

  7. #7
    I'm trying to get it to work with a STM32F4 dev board. Lots to learn though, so may be a while!

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