BQ25713: I2C address needs 8 bit

Timur Yigit2

Part Number: BQ25713

In the document:
www.ti.com/.../bq25713.pdf

In Section "9.5.1.5 Slave Address and Data Direction Bit"
It says the slave address is 7 bit long.

However, in section "9.5.1 I2C Serial Interface"
It says the device operates with the slave address 0xD6.
This would need 8 bit for representation.

All the libraries I tried mask the 8th bit.

What is the actual address of the device if I2C is used for communication?

over 6 years ago

0 Joel Hernandez II over 6 years ago

TI__Mastermind 25800 points

Hey Timur,

You are correct about this incongruity in the datasheet. The correct 7-bit slave address is given in Table 6 of the datasheet is 0x6B.

I believe section 9.5.1 I2C Serial Interface was giving the single-bit shifted version of the aforementioned slave address which results in an 8-bit value of 0xD6 for a write command. For a read, this would yield 0xD7.

Regards,
Joel H

0 Timur Yigit2 over 6 years ago in reply to Joel Hernandez II

Prodigy 70 points

Thank you very much.
I got it running now.

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BQ25713: I2C address needs 8 bit