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TPS65910: EEPROM data retention

Aaron Spaete
Expert 4330 points
Part Number: TPS65910
Other Parts Discussed in Thread: AM3505

Team, 

My customer has the following question. 

Can you tell us the Data Retention of the EEPROM in the  TPS65910A1RSL, including any data that TI programs into it to configure it.  The 2018 data sheet does not include any information about data retention from what I can tell. 

We have a 21 year requirement.  If TI is using the EEPROM for configuration then our requirement would be even longer.

Regards,

Aaron

  • 0
    TI__Mastermind 30280 points

    Aaron, 

    I do not know of any devices that contain a specification on data retention. 

    In my experience, the only data we have is based on the # of write cycles for the EEPROM memory, not the length of time for which data is retained.

    Can you provide any examples of TI devices for which data retention is specified in terms of length of time?

  • 0 in reply to Brian Berner
    Prodigy 30 points

    Brian,

    TI slaa392a is for the flash in your msp430.  The TPS65910A1RSL has EEPROM, but it is the same issue.  Flash and EEPROM devices have memory retention limitations. 

    So, 2 questions:

    1. Is TI using the EEPROM to store TI's configuration settings?

    2. How long is the data retention in this EEPROM?  It is likely temperature dependent and I assume TI has curves for this like in slaa392a.

    Can you address this quickly? 

    Thank you.

    Lee

  • 0 in reply to Lee Weber
    TI__Mastermind 30280 points

    Lee Weber said:
    1. Is TI using the EEPROM to store TI's configuration settings?

    In the TPS65910, there are multiple banks of registers.

    BOOT[1..0] Result
    00b OTP Bank 1
    01b OTP Bank 2
    10b EEPROM settings
    11b Reserved

    When you use TPS65910A1RSL and set BOOT1=1b, BOOT0=0b, then you are telling the device to Boot from EEPROM.

    Lee Weber said:
    2. How long is the data retention in this EEPROM?  It is likely temperature dependent and I assume TI has curves for this like in slaa392a.

    Flash memory is the same technology as EEPROM. My understanding is that both devices are using TI Flash/EEPROM, and the same characteristics apply to both the MCU and the PMIC as explained in SLAA392.

    For all other quality-related questions, you would need to go to https://www.ti.com/quality/docs/estimator.tsp and enter your orderable part number to retrieve the qualification data.

    In an unrelated question, what are you powering with the TPS65910A1RSL? I do not see a User's Guide explaining the purpose of the -A1 variant. However, the TPS65910AA1, TPS65910A3A1, and TPS65910A31A1 are all used to power Sitara AM335x processors. On the other hand, User's Guides for AM3505/-3517 and OMAPL137/-138 do not say which TPS65910 variant is used.