How to communicate with a bq34z100 via i2c ?

Xiaoming Wu

Other Parts Discussed in Thread: BQ34Z100

I use a DSP communicate with a bq34z100 via i2c . The bq34z100 is new(unconfigured). Can I read the DEVICE_TYPE in unconfigured state? My test step is:

1 . Trans Control() command (0x00 and 0x01) ;

2. Trans sub-command (0x00 and 0x01) ;

3. Read back two bytes.

The read back data is 0x01 and 0x00. But i think the data shoud be 0x0541 (Line 3 of table 3 for datasheet page 10) .

so , where is my mistake ?

thanks!

over 12 years ago

0 ThomasCosby over 12 years ago

TI__Guru 73830 points

Xiaoming,

The datasheet needs to be updated. The Device Type should return 0100 for the bq34z100. Your data is correct.

Tom

0 Xiaoming Wu over 12 years ago in reply to ThomasCosby

Prodigy 20 points

Where can I find the new datasheet? I read the datasheet carefully. But I can not understand how to communication via IIC yet. Could you give me some analysis for bq34z100 IIC communication ? Thanks!

0 ThomasCosby over 12 years ago in reply to Xiaoming Wu

TI__Guru 73830 points

Xiaoming,

We have not corrected the datasheet yet, but you got the correct data when you read the Device Type. I provided an example of reading Control Subcommands in this forum entry.

http://e2e.ti.com/support/power_management/battery_management/f/180/p/213060/820268.aspx#820268

Regards
Tom

0 arun over 8 years ago in reply to ThomasCosby

Intellectual 450 points

sir,
how to configure pack configuration register and how to read that register after configuraion

Power management

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How to communicate with a bq34z100 via i2c ?