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Thread: Teensy 4.0 i2c pull-up resistors

  1. #1
    Junior Member
    Join Date
    Aug 2019
    Posts
    1

    Teensy 4.0 i2c pull-up resistors

    Hi, I'm just checking if Teensy 4.0 requires i2c pull-ups similar to 3.6?

  2. #2
    Senior Member+ defragster's Avatar
    Join Date
    Feb 2015
    Posts
    9,039
    Yes, external pullups need to be present for use

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