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BQ76PL455A: bq76PL455A / Register for VSENSEx voltage

S.Satoshi
Guru 21685 points
Part Number: BQ76PL455A

Hi,

I believe that bq76PL455A can report VSENSEx voltage that is measured by internal ADC because cell voltage can be seen at "Cells" tab in GUI as attached. But I can't find the register for VSENSEx voltage in datasheet. So please let me know which register I should read to know cell voltage.

Best Regards,

Satoshi / Japan Disty

  • 0
    TI__Genius 11480 points
    Hello Satoshi,

    To read back the cell voltages, there are several ways. All of them revolve around the command register (address 0x02).
    Ther
    One way is to do a sample and send (writing 0x00 to the command register). The 455 will then sample the configured channels and transmit the data back to the host MCU. It is then up to the host MCU to parse the data coming back.

    Another way is to sample and store the data, and then read back the data with a "Read Stored Values" command. The MCU must still parse the data, though.

    If you read through the information for the Command Registerin the datasheet it explains it in more detail. There are also TMS570 examples in the example code and software design reference, found on this page: www.ti.com/.../technicaldocuments