BQ79758-Q1: IIC question

Ryker She

Part Number: BQ79758-Q1
Other Parts Discussed in Thread: TCA9548A-Q1

Tool/software:

Hi expert,

My customer need to use two I2C communication in BQ79758-Q1. So could you help to confirm how can we configure GPIO2-11 of BQ79758-Q1 as I2C? R&D feedbacked that they have configured general GPIO as I2C in other devices and the I2C communication would delay or suspend (abnormal).

Therefore, could you share some design guide to configure general GPIO (GPIO2-11 of BQ79758-Q1) as I2C and make sure the I2C communication performance? Thanks a lot.

Best Regards,

Ryker

6 months ago

0 Anthony P Pham 6 months ago

TI__Mastermind 23410 points

Hi Ryker,

Only GPIO1 and GPIO2 can be used as I2C pins on the BQ79758-Q1 when the BQ79758-Q1 is configured as a stack device. Other GPIOs cannot be configured as I2C regardless of performing as a base or stack device.

Best Regards,

Anthony Pham

0 Ryker She 6 months ago in reply to Anthony P Pham

TI__Expert 4190 points

Hi Anthony,

My customer need to use two I2C in BQ79758-Q1, do we have some solution to realize this require?

Best Regards,

Ryker

0 Anthony P Pham 6 months ago in reply to Ryker She

TI__Mastermind 23410 points

Ryker,

As previously mentioned, other GPIOs cannot be utilized for I2C. There is no solution where it is just the BQ79758-Q1. You will need an I2C switch such as the TCA9548A-Q1.

Best Regards,

Anthony Pham

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BQ79758-Q1: IIC question