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IIC

SARAVANAN KANNAN

Dear friends,

How can I select a device among 50 other devices through I2C? SDA and SCL is one of them. But how to identifiy. For example I want send a hex value from master to device number 3. How to set that. after device number 4 and so on.

Thanks,

K. Saravanan

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  • 0 in reply to Andy Neil

    This basically is a reply to your other theread that, for some reason, do not allow me to post.I am using 50 terminals of microcontroller (P89LPC936)8051 base. I don't know how to communicate with each of them
    if the 50 are 'identical' add #51 the master

    each of them are 1 meter far.
    NXP had IIC bus extenders.

    the name of the game for IIC is capacitance and speed. If you do not have any noise 'risk' you can go quite far with IIC if you slow down. NOTE a long slow IIC line is EXTREMELY noise sensitive.

    Erik

Reply
  • 0 in reply to Andy Neil

    This basically is a reply to your other theread that, for some reason, do not allow me to post.I am using 50 terminals of microcontroller (P89LPC936)8051 base. I don't know how to communicate with each of them
    if the 50 are 'identical' add #51 the master

    each of them are 1 meter far.
    NXP had IIC bus extenders.

    the name of the game for IIC is capacitance and speed. If you do not have any noise 'risk' you can go quite far with IIC if you slow down. NOTE a long slow IIC line is EXTREMELY noise sensitive.

    Erik

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