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CDCI6214: EEPROM Programming

Hirotaka Inoue
Intellectual 2980 points
Part Number: CDCI6214


Hi support member,

EEPROM Access section of dataseet looks that device have to once enter to fall-back mode to write into internal EEPROM.

1. Must RESETN be controled from LOW to HIGH? This procedure isn't shown at Fall-Back Mode section.

2. Are all device supplies allowed only 1.8V but not 2.5V and 3.3V?

Regards, Hirotaka Inoue

  • 0
    TI__Expert 8865 points
    Hello Hirotaka,

    EEPROM can be written in any of the two modes where the serial interface is enabled. Fallback mode is the safe mode as the serial interface might be disabled by the previous EEPROM write.

    1. Must RESETN be controled from LOW to HIGH? This procedure isn't shown at Fall-Back Mode section.
    A: It is recommended to do the RESETN from LOW to HIGH to bring the device into a known state before you start programming, but it is not must for activating the fallback mode.

    2. Are all device supplies allowed only 1.8V but not 2.5V and 3.3V?
    A: All applies can be 1.8/2.5/3.3V or mix supplies as mentioned in the datasheet.

    Best regards
    Puneet
  • 0 in reply to Puneet Sareen
    TI__Intellectual 2980 points
    Hello Puneet,

    Thanks for your answer.

    >EEPROM can be written in any of the two modes where the serial interface is enabled.
    -> We wouldn't like to write EEPROM so easily at normal operation from customer's request. is one method of disable serial interface that SDA and SCL aren't assigned to GPIOs with programed EEPROM?

    Regards, Hirotaka Inoue
  • 0 in reply to Hirotaka Inoue
    TI__Expert 8865 points
    Hello Hirotaka,
    Yes, ee_lock can be written and also the serial interface access can be blocked.
    Best regards
    Puneet
  • 0 in reply to Puneet Sareen
    TI__Intellectual 2980 points
    Hello Puneet,

    Thanks for your answer.

    Regards, H.Inoue