MCP23016 I/O expander

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  1. - 23rd October 2005, 12:20 #15
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    NavMicroSystems
    NavMicroSystems is offline Senior Member
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    Robert,

    you should really read the I2C Specs.

    Your schematic will never work.
    The SDA Line is Bidirectional!

    I2C is a BUS, so why separating the SDA lines
    if there are no more than 8 devices of the same type on the same bus?

    If (for what reason ever) you want to isolate the bus use THIS schematic.

    Attached is a schematic that should work for you.
    Attached Images Attached Images  
    regards

    Ralph

    _______________________________________________
    There are only 10 types of people:
    Those who understand binary, and those who don't ...
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