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Type: Posts; User: palmerr

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    Yes, one set of pullups for each I2C bus. The...

    Yes, one set of pullups for each I2C bus.

    The best value depends on the I2C frequency, rail voltage and the bus capacitance (related to the wire length).

    As a rule of thumb for 400kHz...
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    As I2C is an open drain bus, it will float up to...

    As I2C is an open drain bus, it will float up to whichever supply the pullup resistors are attached to.

    As Paul provides pullups on the Audio Board, attached to the 3.3V rail, you should be OK.
    ...
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