SLVU957A September   2019  – November 2021 BQ76922

 

  1.   Trademarks
  2. 1Features
    1. 1.1 Kit Contents
    2. 1.2 Ordering Information
    3. 1.3 BQ76922EVM Circuit Module Performance Specification Summary
    4. 1.4 Required Equipment
  3. 2BQ76922EVM Quick Start Guide
    1. 2.1 Before You Begin
    2. 2.2 Quick Start
  4. 3Interface Adapter
  5. 4Battery Management Studio Software
    1. 4.1 System Requirements
    2. 4.2 Installing BQStudio
    3. 4.3 BQ76922 bqz File Installation
    4. 4.4 BQStudio Operation and Registers View
    5. 4.5 Commands
    6. 4.6 Data Memory
      1. 4.6.1 Entering, Saving, and Loading Configuration
      2. 4.6.2 OTP Programming
    7. 4.7 Calibration
    8. 4.8 Command Sequences
  6. 5BQ76922EVM Circuit Module Use
    1. 5.1 Cell Simulator
    2. 5.2 Evaluating with Load Current
    3. 5.3 Evaluating Charge and Discharge Currents
    4. 5.4 Evaluating with Simulated Current
    5. 5.5 Reducing the Cell Count
    6. 5.6 Connecting Cells
    7. 5.7 Connecting to a Host
    8. 5.8 Hardware Configuration
      1. 5.8.1 Configuration Jumpers
      2. 5.8.2 Unused Components
    9. 5.9 Configuration Register Programming
  7. 6BQ76922EVM Circuit Module Physical Construction
    1. 6.1 Board Layout
    2. 6.2 Bill of Materials
    3. 6.3 REACH Compliance
    4. 6.4 Schematic
  8. 7Related Documents from Texas Instruments
  9. 8Revision History

4.6.2 OTP Programming

CAUTION:

OTP programming is a permanent change to the device. Be sure all configuration and calibration are set before programming settings into the device. Casual programming may leave the board inoperable. Writes to OTP are not incremental, all OTP is written at the same time.

Once the configuration and calibration has been determined and loaded in the registers, it may be programmed to the BQ76922 OTP memory using the Program OTP button at the top of the pane. Note that this is a permanent programming and is not reversible. There are 2 writes possible, if the device has been programmed once, a second memory is available. Additional memories are not available. OTP memory is programmed using the OTP memory view. Programming typically takes about 40 s. To program the OTP memory:

  1. OTP write requires 12V at the board stack and room temperature. Calibrate the device if needed.
  2. Be sure the desired settings are written to the data memory.
  3. Select the Program OTP tool at the top of the Data Memory window. This opens a Program OTP pane.
  4. Adjust the board voltage to 12.0 +/- 0.1 V for programming.
  5. Select the Check OTP Programming Possible button. If not successful make the recommended adjustments if possible. If successful, the display is similar to Figure 4-7.
  6. Select the Program Data Memory to OTP Memory button. If successful, the display is similar to the check.
  7. Adjust the board voltage back to normal operating conditions, cycle power, and test as desired.

GUID-390BB3EC-4F9F-4AA1-8044-2102DEFC83AF-low.pngFigure 4-7 Program OTP Pane with Success Display