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Interfacing I2C eeprom with PIC

Discussion in 'Electronic Design' started by Ankur Kashyap, Oct 17, 2003.

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  1. I have interfaced AT24C16 serial eeprom with AT8951 & PC's parallel
    port successfully. I'm employing the same logic for interfacing it
    with PIC 16F84 (micro controller from Microchip) but it the controller
    is always reading 0xFF from all the addresses. I have connected same
    value of pull up resistors (10K) as I did with 8951 interface.

    Plz suggest me where I may be wrong.

    Ankur Kashyap
  2. Mario Trams

    Mario Trams Guest

    Perhaps you make a mistake when controlling the I2C interface of
    the PIC?


    Digital Force / Mario Trams

    Chemnitz University of Technology
    Dept. of Computer Science Tel.: (+49) 371 531 1660
    Chair of Computer Architecture Fax.: (+49) 371 531 1818
  3. Maybe you exeed the maximum i2c speed (400KHz or 100KHz)?
    It happened to me very recently (today)...

    Ciao Claudio.
  4. Paul

    Paul Guest

    Post your code and i will have a look at it
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