BQ78350: SMBUS issue

Dear Shirish:

thanks very much for your feedback 

After testing, it is found that the communication can be normal using 0X0B.  

The register value can be read normally in the boot stage using SMbus, but it cannot communicate normally after the system is up. We are investigating this problem.  Could you give me any suggestion ？

Hello Cooper,

Good to know that you were able to communicate using 0x0B. Check the waveform to see if there are signals going out. Check if STOP condition is sent and valid before a new transaction is started.

Hi Shirish:

We can now read the value of register BQ78350 normally.

We read the remaining battery percentage from the AbsoluteStateOfCharge (0x0E) register and the associated Voltage from Voltage (0x09).

Which register can be read to see if the charger AC is inserted.

Current (0x0A) returns the Current of charge and discharge. If it is this register, how should this value be converted to obtain the state of AC

Hello, Shirish,

you said " Operation Status to determine charge FET state to determine" ,  

Which register does Operation Status refer to?

Please explain the specific judgment process and the register in detail, many thanks

Shirish:

add a question ,

In addition, when charging, we read register 0x0A with a value between 120 and 130. It says in the manual that this value is the size of the charging current or discharging current, and the unit is Ma. This is the charging current or do I need to convert?

If you don't need to convert from the reading value of the charging current is 120 to 130ma, this charging current is too small. How to configure to increase the charging current?

Dear Wyatt:

SMBUS communication，I have another question ,

Using the CHEM_ID (0x6) command，We use Battery Management Studio to read the chemical ID 0x1210 of BQ78350-R1 ；

But this parameter is wrong, how to modify this chemical ID?

in Studio, only to see the read value,  I do not find the edit table， so  need your great help 

Dear Wyatt：

I could not update the chemical ID just now because the version of my local software is too low. After updating the software, it will be ok

After changing the chemical ID, the remaining capacity of the coulometer is displayed  0. The value of register 0x0e is also read as 0.

What other configuration is needed after changing the chemical ID, so that the remaining battery can be displayed normally

Hello Cooper,

Did you use bqStudio's Chemistry tab to program the chemical ID? A reset is usually required after programming for the gauge to estimate capacity.

Dear Shirish:

yes ， it is ok after reset, many thanks~

however,  Battery Management Studio collects Battery discharge time, voltage, current, and temperature data . These data can be recorded using bqStudio's log function

How to use the log function?

got it；

BQ78350 ，how  are the registers  configured to the appropriate value, so that when the voltage of one of the four batteries is lower than 2.5V, BQ78350 will not supply power to the outside, so as to protect the battery.

Hello Shirish,

The customer would like to confirm if only CUV is required to be set, are there any other enable switches that need to be configured?

And could you provide the link of TRM?

Shirish said:

Protections documentation in the TRM.

Thanks and regards,

Cherry