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BQ76952: How to check if the AFE already OTP?

ethan hsu
Prodigy 30 points
Part Number: BQ76952

Tool/software:

Hi Ti Experts,

We use the TI bq7695202 AFE.

We follow the document to test OTP commands, and the result is successful.

We would like to use OTP in the production line, but how do we know if the AFE is already OTP or not?

Does any register to check if the AFE is already OTP?

How to know the number of OTPs remaining in the AFE?

Thanks.

  • 0
    TI__Expert 4320 points

    Hello,

    To check if the part has been OTP you can compare the settings to the default settings.

    As for the number of OTPs remaining, we do support any indication of this.

    Best regards,

    Thomas Rainey

  • 0 in reply to Thomas Rainey
    Prodigy 30 points

    Hi Thomas

    To check if the part has been OTP you can compare the settings to the default settings.

    It's ok. 

    "As for the number of OTPs remaining, we do support any indication of this."

    According to the TRM, TI bq76952 supports 8 signatures for partial OTP writing.

    May I know what command or register can read or check the number of OTPs remaining?

    The bit3 "No_Data" of the (0x00A0) OTP_WR_CHECK() command just describes "Could not program data" but we do not know the number of OTPs remaining.

    Thanks

    Ethan Hsu

  • +1 in reply to ethan hsu
    TI__Expert 4320 points

    Hi Ethan,

    We do not support any indication of how many OPTs are remaining. This will be something you need to keep track of.

    Best regards,

    Thomas Rainey