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bq78PL114 - How to access the ChargeCompletion (CC) flag

N Luna
Intellectual 740 points
Other Parts Discussed in Thread: BQ78PL114, BQWIZARD, BQ78PL116

Hi,

I'm using BMS bq78PL114 to charge batteries. I would like to know how to access charge completion (CC) flag. It is possible to see it in bqWizard, but I need to read it from my microcontroller. There is no SBS command to read it.

Thanks.

Regards,

Nicolas

 

  • 0
    TI__Intellectual 1940 points

    The Charge Status Register, which contains the Charge Completion Bit, can be viewed using standard SMBus commands at registers 0x3C - 0x4B in the case of the bq78PL114S12 and 0x3C - 0x58 in the case of bq78PL116.  Use the bqWizard to change the default configuration of these registers to a host of parameters. 

    1. Install the bqWizard 3 on your PC.
    2. Under the Utilities menu is Add Ons, select Pack Configuration Utility.
    3. Select device type.
    4. Add parameters by double clicking those listed in the Available Device Parameters Window.
    5. Save this listing to a file.  The file extension is .sbd.
    6. Close Utility.
    7. Under the bqWizard File Menu, select Pack Configuration
    8. Then select Load Configuration File and Relearn.
    9. Open the file created in step 5.

    The parameters that you selected are now mapped and can be read by your SMBus host.

  • 0 in reply to Jim M15252
    Intellectual 740 points

    Jim,

    What is the bit index of CC? I can't find it in the TMR. Logically, if I check into bqWizard, it should be bit1 or bit14.

    Thanks.

    Regards,

    Nicolas

  • 0 in reply to N Luna
    TI__Intellectual 1940 points

    Bit 0–5: Reserved

    Bit 6: CSLT – Charge Suspend Low Temperature

    Bit 7: CSHT – Charge Suspend High Temperature

    Bit 8: CILT – Charge Inhibit Low Temperature

    Bit 9: CIHT – Charge Inhibit High Temperature

    Bit 10: PV – Pre-Charge Voltage

    Bit 11: PT – Pre-Charge Temperature

    Bit 12: CT – Charge Timeout

    Bit 13: PTO – Pre-Charge Timeout

    Bit 14: CC – Charge Completion

    Bit 15: DC – Discharge Completion

  • 0 in reply to Jim M15252
    Intellectual 740 points

    Thanks it worked !!

    Regards,

    Nicolas