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EEPROM on the T89C51CC01

Christophe Champigny

Does anyone now if it's necessary to keep the EEE flag set to 1 of the EECON register (register to manage the internal EEPROM), when you launch the programming sequence on the EEPL bits ?

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  • 0 in reply to Christophe Champigny

    The EEE bit within the EECON is used to select which bank of memory the MOVX instruction is mapped to access.
    EEE = 1 -> Mapped to EEPROM,
    EEE = 0 -> Mapped to XRAM

    For writing to the internal EEPROM, EEE must be set, but dont forget that access to XRAM is not available. Use DATA and IDATA space to store var's that are used when EEE is set.

    hope this helps

    Rob

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  • 0 in reply to Christophe Champigny

    The EEE bit within the EECON is used to select which bank of memory the MOVX instruction is mapped to access.
    EEE = 1 -> Mapped to EEPROM,
    EEE = 0 -> Mapped to XRAM

    For writing to the internal EEPROM, EEE must be set, but dont forget that access to XRAM is not available. Use DATA and IDATA space to store var's that are used when EEE is set.

    hope this helps

    Rob

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