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BQ76952: Issue with CRC on BQ76952 via I2C in BQStudio

Tom Tsao
Expert 1960 points
Part Number: BQ76952
Other Parts Discussed in Thread: BQSTUDIO

Tool/software:

Dear TI Team,

I am currently working with the BQ76952 and have encountered an issue regarding the I2C communication with CRC enabled. The current setup on our EVM Board uses I2C communication without CRC, but I found in the TRM that enabling CRC is possible by setting the Com Type register to 0x11.

I followed the procedure and used BQStudio to change the Com Type register to 0x11, but when I sent the command to read 0x14 (Cell 1 Voltage), the data returned was still a single word without CRC.

Could you please help me understand why the CRC is not being applied even after setting the Com Type register to 0x11? Is there something else that needs to be configured or a different setting in BQStudio to enable CRC functionality?

Thank you for your support, and I look forward to your insights.

Best regards,

  • 0
    TI__Mastermind 18805 points

    Hello Tom,

    Have you used the 0x29BC SWAP_COMM_MODE() subcommand yet after change the Comm Type? This subcommand needs to be sent to transition the device to the communication mode selected by the settings in Settings:Configuration:Comm Type.

    Further information can be found in Section 9.2  I2C Communications Subsystem of the Technical Reference Manual.

    Best Regards,
    Alexis