SLUAAL7 September   2022 BQ35100

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2EVM and System Setup
  5. 3Enabling EOS Mode
    1. 3.1 Steps for Enabling EOS Mode
  6. 4I2C Communication Between the Microcontroller and the BQ35100 EVM
  7. 5Testing Procedure
  8. 6EOS Data Example
  9. 7Final Configuration of the BQ35100 Data
  10. 8Conclusion
  11. 9References

4 I2C Communication Between the Microcontroller and the BQ35100 EVM

To gather resistance and impedance data, the microcontroller uses the addresses specified in the Technical Reference Manual (TRM). The I2C 8-bit address for the BQ35100 is 0xAA. The 7-bit address is 0x55. This address cannot be changed.

For both scaled resistance and measured impedance, the data is stored in little-endian format as unsigned integers. The command 0x16 is used to gather the scaled resistance data, and the command 0x22 is used to gather the measured impedance data. This is the most critical data to be extracted to calculate the appropriate EOS configuration for the system.