SLVSMB0 June   2026

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1 Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  6. 2 Hardware
    1. 2.1 Hardware Requirements
    2. 2.2 Connecting the BQ27Z855 Circuit Module to a Battery Pack
    3. 2.3 EVM Jumpers and Terminal Block Description
  7. 3 Software
    1. 3.1 System Requirements
    2. 3.2 Software Installation
    3. 3.3 Updating Firmware
    4. 3.4 Troubleshooting Unexpected Dialog Boxes
  8. 4 Using bqStudio
    1. 4.1 Starting the Program
    2. 4.2 Setting Programmable BQ27Z855 Options
    3. 4.3 Configuring the Integrated Linear Battery Charger
  9. 5 Calibrating Gauge Measurements
    1. 5.1 Voltage Calibration
    2. 5.2 Current Calibration
  10. 6 Chemical ID
    1. 6.1 Chemical ID Selection Process
    2. 6.2 Hardware Requirements and Setup
    3. 6.3 Logging Data in bqStudio
    4. 6.4 GPCChem Tool
    5. 6.5 Programming a Chemical ID
    6. 6.6 Further Resources for Chemical ID Process
  11. 7 Learning Cycle and Golden Image
    1. 7.1 Learning Cycle Process Description
    2. 7.2 Data Memory Configuration
    3. 7.3 Learning Cycle Steps
    4. 7.4 Low Temperature Optimization
    5. 7.5 Creating the Golden Image File
    6. 7.6 Programming the Golden Image File
  12. 8 Gauge Communication
    1. 8.1 Advanced Communication in bqStudio
    2. 8.2 Standard Data Commands
    3. 8.3 Manufacturer Access Commands
    4. 8.4 Further Resources on Gauge Communication
  13. 9 BQ27Z855-Based Circuit Module
    1. 9.1 Circuit Module Connections
    2. 9.2 Pin Descriptions
  14. 10Hardware Design Files
    1. 10.1 Schematic
    2. 10.2 Bill of Materials (BOM)
    3. 10.3 PCB Layouts
  15. 11Additional Information
    1.     Trademarks

8 Gauge Communication

This section introduces host-processor communication with the BQ27Z855. The BQ27Z855 gauge uses an I2C communication interface with communication speeds up to 1MHz. Further hardware and software specifications for the I2C interface for this gauge can be found in the BQ27Z855 Data Sheet and the BQ27Z855 Technical Reference Manual.