BQ27Z746: Can I use BQ-BMS-PROGRAMMER-SW on this fuel gauge?

Hello Soo, 

This question has been assigned and will be answered as soon as possible.

Thank you,
Alan 

Hello Soo,

We recommend sticking with BQStudio throughout the process of development, this tool would be the most streamline and user friendly software to use.

BQStudio: 
https://www.ti.com/tool/BQSTUDIO

Thank you,
Alan 

Hi Alan,

Thanks for your reply.

We are thinking to use EV2400 with BQ-BMS-PROGRAMMER-SW to program golden image in production line if possible.

What is the recommended method of programming golden image in production line from TI?

Regards,

Soo San

Hello Soo, 

There is no production tool that is provided by TI either than BQPRODUCTION but this is mainly meant for pervious generation of EV2300. The customer is responsible for delivery the golden image file on there end however this package can be sent in a i2C format as well.

BQPRODUCTION:
https://www.ti.com/tool/BQPRODUCTION

Thank you,
Alan

Hi Alan,

Thanks for the info.

I have further questions as below:

1. What is the difference between bq.fs , df.fs and gm.fs files?
2. Which file is the correct file to use for programming golden image through I2C? bq.fs or df.fs or gm.fs ?

Regards,

Soo San

Hello Soo San Lee,

1-Pleaes reference this e2e trend that discuss the difference,

E2E:https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/693584/bq27742-g1-difference-between-bq-fs-and-df-fs-file

2- The most common would be bq.fs and df.fs and the choice would be up to the user. In terms of which programming the golden image this can also be done through the MCU. I've attached documentation that better discuss the process of this.

Gauge Communication:
https://www.ti.com/lit/an/slua801/slua801.pdf?ts=1744211163154&ref_url=https%253A%252F%252Fwww.google.com%252F

Thank you,
Alan

Hi Alan,

We need to program the bq.fs using external tool like Aardvark I2C/SPI Host Adapter (can we use this tool?).

I tried to program the golden image through I2C.

.

.

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The I2C data can be sent successfully from beginning until W: AA 00 00 0F

When go to ROM Mode, I failed to send the data (with slave address : 0x16, data : 07 DE 83).

Could you please advise what is the correct way to send the I2C data during ROM Mode?

Thanks.

Regards,

Soo San

Hello Soo San,

We don't give support on external tools for gauge programming, this is the role of the developer to make and debug a system to program with the gauge. I've attached a document that can help in this process.

Gauge Communication:
https://www.ti.com/lit/an/slua801/slua801.pdf?ts=1744307450156&ref_url=https%253A%252F%252Fwww.google.com%252F

Thank you,
Alan

Hi Alan,

Is BQ27Z746 a flash gauge or ROM gauge?

If it is a flash gauge, is it able to enter ROM mode?

Or does it need another command to enter reprogramming mode?

Regards,

Soo San

Hello Soo San, 

The BQ27Z746 is a flash gauge (typically gauges with the letter "Z" in the name are flash gauges), I've attached this other document that although it is not for the gauge you are using it application is still similar.

Using I 2C Communications With the bq34110, bq35100, and bq34z100-G1 Series of Gas Gauges:
https://www.ti.com/lit/an/slua790/slua790.pdf?ts=1744647736040&ref_url=https%253A%252F%252Fwww.google.com%252F

Thank you,
Alan

Hello Soo San, 

The BQ27Z746 is a flash gauge (typically gauges with the letter "Z" in the name are flash gauges), I've attached this other document that although it is not for the gauge you are using it application is still similar.

Using I 2C Communications With the bq34110, bq35100, and bq34z100-G1 Series of Gas Gauges:
https://www.ti.com/lit/an/slua790/slua790.pdf?ts=1744647736040&ref_url=https%253A%252F%252Fwww.google.com%252F

Thank you,
Alan

Hi Alan,

Thanks for the information.

My issue is same with the post below:

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1194069/bq27z746-device-fw-using-flashstream-file-to-program-device-fw-and-flash-data

However there is no conclusion on the cause and the solution.

Let me know if you have more information regarding this issue.

Thank you.

Regards,

Soo San

Hello Soo,

Has this behavior been seen on multiple ICs?

Regards,

Adrian