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BQ34Z100: EV2400

HAO JIANG
Prodigy 10 points
Part Number: BQ34Z100
Other Parts Discussed in Thread: BQSTUDIO,

Hi,

With the BQ34z100,we have the following problems need help ：

1）Using BQ studio, I can write the contents of the register(like DesignCapacity), but the MCU cannot write to the register

2）What specific registers are related to the capacity and can be accessed through I ² C Change

Waiting for your reply.

Thanks

  • 0
    TI__Guru 57697 points

    Hello Hao, bqStudio uses I2C to read/write from the bq34z100. MCU with I2C can do everything that bqStudio can do. Most customers read Remaining capacity %, but you can read all registers on "Registers" tab if required. Just make sure not to read too frequently as it could leave the gauge with no time left for gauging.

  • 0 in reply to Shirish
    Prodigy 10 points

    Hi Shirish,Why the read value is inconsistent with the written value.Is the data writing step wrong? But i can write data directly from DATA Memory. What is the difference between the two methods?Now I need to use Advanced Comm to write data to a read-only address. What should I do?

  • 0 in reply to HAO JIANG
    TI__Guru 57697 points

    Hello Hao,

    Read only registers cannot be written. Data memory can be written under some conditions. See the bq34z100-G1 TRM section 2.2.33.3 Access Modes for details.

    The TRM also has all the command information to read/write data memory.