about BQ24153 I2C communication

David Huang14292

Other Parts Discussed in Thread: BQ24153

A. Follow the BQ24153 (SLUSABO - OCT 2010) datasheet page 27, I2C sequence as below: It is ok for MCU to write the register of BQ24153. However, the register contents which read from BQ24153 is not the same as what MCU write the register of BQ24153. BQ24153 register contents are FF even after it is written by MCU.

SLAVE ADDRESS

R/W

DATA

A/A

B. If I2C squence shows as below, the register content of BQ24153 is the same as what is written by MCU.

SLAVE ADDRESS

DATA

Could you help check what is the I2C issue of it? Thanks,

over 12 years ago

0 Jeff F over 12 years ago

TI__Guru*** 147165 points

To which addresses are you writing? The two safety limit registers are locked after a WRITE to any other register.

0 Jeff F over 12 years ago in reply to Jeff F

TI__Guru*** 147165 points

Also, which mode are you using F/S or H/S?

0 Jacob zhang over 12 years ago

Prodigy 30 points

Dear Jeff,

Thanks for your reply.

The address is 0x07,and I have only read the value of register,could you please tell me which the two safety limit registers are locked after a WRITE to any other register?

What need us to be care?

0 Jacob zhang over 12 years ago in reply to Jeff F

Prodigy 30 points

Dear Jeff,

Thanks for your reply.

We use the F/S mode.

0 Jeff F over 12 years ago in reply to Jacob zhang

TI__Guru*** 147165 points

Top of datasheet page 30 gives the information about the safety limit register.

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about BQ24153 I2C communication