SLUAA11B February   2020  – August 2021 BQ769142 , BQ76922 , BQ76942 , BQ76952

 

  1.   Trademarks
  2. 1Direct Commands
    1. 1.1 Alarm Enable - 0x66
    2. 1.2 Cell 1 Voltage - 0x14
    3. 1.3 Internal Temperature - 0x68
    4. 1.4 CC2 Current - 0x3A
  3. 2Subcommands
    1. 2.1 DEVICE_NUMBER - 0x0001
    2. 2.2 MANUFACTURING STATUS - 0x0057
    3. 2.3 FET_ENABLE - 0x0022
    4. 2.4 RESET - 0x0012
  4. 3Reading and Writing RAM Registers
    1. 3.1 Read 'Enabled Protections A'
    2. 3.2 Enter CONFIG_UPDATE Mode
    3. 3.3 Write 'Enabled Protections A'
    4. 3.4 Write 'VCell Mode'
    5. 3.5 Exit CONFIG_UPDATE Mode
  5. 4I2C With CRC
  6. 5SPI With CRC Examples
    1. 5.1 Direct Command Example: Alarm Enable - 0x66
    2. 5.2 Direct Command Example: Cell 1 Voltage - 0x14
    3. 5.3 Subcommand Example: Device Number - 0x0001
    4. 5.4 Subcommand Example: FET_ENABLE - 0x0022
    5. 5.5 Subcommand Example: RESET - 0x0012
    6. 5.6 RAM Register Read Example: Enabled Protections A
    7. 5.7 RAM Register Write Example: Enabled Protections A
  7. 6Simple Code Examples
  8. 7References
  9. 8Revision History

1.2 Cell 1 Voltage - 0x14

Table 1-2 shows how to read the voltage for Cell 1. The Cell 1 Voltage command is 0x14 and is a read only command. The Cell 1 voltage is read by writing the I2C command 0x14 followed by a 2-byte read. The data is returned in little endian format. In the following example, the 16-bit Cell 1 voltage read 0x0E74, which corresponds to 3700 mV.

Table 1-2 Cell 1 Voltage Command Description
Command Name Units Type Description
0x14 Cell 1 Voltage mV I2 16-bit voltage on cell 1
GUID-8B484EC2-3D33-461F-B94A-4E4CFC5AC56E-low.png Figure 1-2 Captured I2C Waveform for Cell 1 Voltage Reading