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Pull up resistor values

2010-05-23
2012-10-27
  • Future.child

    Future.child - 2010-05-23

    Hi,

    I've just read trough the documentation and noticed the values for the pull up
    resistors R141/R142 (ST7-ICC board) and R152/R153 (mem-I2C-SPI-uW board) on
    the adapter boards are not mentioned.
    I assume they should be 4K7 ?

    b.t.w. thank you for sharing this project.

     
  • Alberto Maccioni

    Hello,
    since there are already two I2C pull-up resistors on the base module you don't
    need R152/153; these are in place in case you want to communicate at higher
    speed and a 10k pull-up is not enough; however up to now I've only used 100k
    speed so I don't need extra resistors.
    The ST7 adapter is not really released, I don't even know when I'll work on
    it, probably next year.

    A.

     

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