BQ51222: I2C slave ID

user5070617

Prodigy 90 points

Part Number: BQ51222
Other Parts Discussed in Thread: BQ51021

Hello

I am TJ of ASE RD.

We would like to use I2C interface to debug.

and we found I2C address is 0x6C at page 33 of spec.

But after send 0x6c to BQ51222 , it seems not to reply ack , SDA is High.

So , could you help check again the BQ51222 I2C address is 0x6c ?

Thanks in advance.

over 7 years ago

0 Bill Johns over 7 years ago

TI__Guru* 75856 points

Hello TJ
We will double check the I2C address.
But you are in debug on the unit -- is the device in power transfer and voltage at RECT stable? This the internal housekeeping voltage also.

0 user5070617 over 7 years ago in reply to Bill Johns

Prodigy 90 points

Hi Bill

Yes , the RECT is stable, and Vout keep output 5V. Thanks.

0 Bill Johns over 7 years ago in reply to user5070617

TI__Guru* 75856 points

Hi TJ
The address is 0x6C
We have not had problems with the address it is the same on bq51021 and ba51025 and bq510221 also.
Also the BQ5102X EVM GUI may be help in debugging the problem.
www.ti.com/.../sluc575

Power management

Power management forum

BQ51222: I2C slave ID