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BQ78350-R1: How to change BQ78350-r1 Address

Laker Lian
Intellectual 290 points
Part Number: BQ78350-R1
Other Parts Discussed in Thread: BQSTUDIO

Hello,Ti:

Now I have a question. How do I change the address of bq78350r1 to 0x0B from 0x17,

I gave SMBA the voltage of a few volts according to the specification, and changed the SMBTAR_ADDR0 to SMBTAR_ADDR7 all to 0x0b, but the address that was read from EV2300 was still 0x17,

How could I solve it ?

  • 0
    TI__Guru* 76230 points
    Hi Laker,
    pls review section 16.4 of the TRM of the device below.

    www.ti.com/.../sluubd3c.pdf
    thanks
    Onyx
  • 0
    TI__Mastermind 25955 points
    Hi Laker,

    To add on to Onyx's suggestion:

    Please ensure that SMB Configuration [FIXED_ADDR] is disabled (set to 0).

    In addition, please power cycle the device (allowing enough time for the capacitors to deplete).

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    Intellectual 290 points

    Hi Bryan,

             When I  connect SMBA direct to groud ,I open the BMS （Battery Management Studio）soft，It will automatically identify the bq78350r1 chip and the Registers Interface is highlighting. I tested the basic functionality that was normal and disabled the [FIXED_ADDR]  (set to 0)

              But when I connect SMBA direct to DC power 0.2V ,I open the BMS （Battery Management Studio）soft again. It cannot automatically identify the bq78350r1 chip ，So i  manually select the bq78350r1 chip and the Register interface is gray not highlight. So i think the communication is unnormal. But when I opened the Adanced Comm SMB interface and enter the address，it responsed as follow：

    So i think the communication is normal in fact，but why when i open  the BMS （Battery Management Studio）soft , it cannot automatically identify the bq78350r1 chip and i  manually select the bq78350r1 chip and the Register interface is gray not highlight

    How can i solve it and how do i understand it？

    Thank you！

       Laker Lian

  • 0 in reply to Laker Lian
    TI__Guru* 76230 points
    Hi Laker,
    Bqstudio can only respond to the default address. Once you change it, or clear the fixed_addr flag, it will not repond.
    thanks
    Onyx
  • 0 in reply to Onyx Ahiakwo
    Intellectual 290 points
    Hi Onyx:

    As you said, now there have two question：

    1、If i have changed the address and cleared the fixed_addr flag, How do I get back to my original state? How do I resume communication with Bqstudio?
    （Remark：now my current tool is only Bqstudio ）

    2、If I want to MP ，how do I verify that the chip function is normal?
  • 0 in reply to Laker Lian
    TI__Guru* 76230 points

    Hi Laker,

    I did not realize the functionality has been recently added to bqstudio that allows you to chose a different address which you changed it to and communicate with the device. See snippet below.

    2. In MP you should be able to communicate with the gauge.

    thanks

    Onyx

  • 0 in reply to Onyx Ahiakwo
    Intellectual 290 points

    Thank you Onyx,Now the problem has been solved！！！