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TCA9535: do we have I2C I/O expander support NVM setting?

Ann_Lien
Genius 14430 points
Part Number: TCA9535
Other Parts Discussed in Thread: MSP430G2203

Hello expert,

My customer would like to know if we have IO expander support NVM setting could store configuration inside IO expander, power reset would not loss the information from host? Thanks!

Best regards,

Ann Lien

  • 0
    Guru 317080 points

    TI does not make such a device.

    In theory, it would be possible to program a microcontroller (e.g., MSP430G2203) to do this.

  • 0
    TI__Mastermind 47908 points

    Hi Ann,

    This device does not have non-volatile memory. When power is off on this device, registers will be set to their default values upon power up. 

    Clemens is correct in his thinking. One way to potentially solve this is to maintain the history of the registers in another device such as a microcontroller. This way, the MCU can keep account of the states of each register. When a RESET condition occurs on the IO expander, the MCU can simply recall the values to the registers. 

    Regards,

    Tyler