Texas Instruments BQ769x2 Application Note

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Application Note
BQ769x2 Control Based on MSPM0 Through I2C
Adrian Liu, Eason Zhou, Helic Chi
The MSPM0 series microcontroller (MCU) portfolio offers a wide variety of 32-bit MCUs with ultra-low power
and integrated analog and digital peripherals for sensing, measurement, and control applications. Reducing
power consumption while performing complex real-time applications presents a major challenge for the recent
embedded applications. This article was created to build a simple framework to help developers quickly setup
the communication between MSPM0 and BQ769x2. Currently, the MSPM0 L series and G series are supported,
and sample code is provided based on LP-MSPM0G3507 and LP-MSPM0L1306 LaunchPad
1 Introduction.............................................................................................................................................................................3
2 Hardware Connection.............................................................................................................................................................3
3 Software Structure and Important
3.1 System Initialization...........................................................................................................................................................
3.2 Low-Level Command
3.3 High-Level Function...........................................................................................................................................................
4 Test Result of Important
4.1 Read Alarm Status...........................................................................................................................................................
4.2 Read Safety Status..........................................................................................................................................................
4.3 Read PF Status................................................................................................................................................................
4.4 Read Current....................................................................................................................................................................12
4.5 Read All Temperatures.....................................................................................................................................................12
4.6 Read All Voltages.............................................................................................................................................................14
5 References............................................................................................................................................................................
6 Revision History...................................................................................................................................................................
Figure 2-1. System Block Diagram..............................................................................................................................................
Figure 2-2. LP-MSPM0G3507 and LP-MSPM0L1306 Hardware
Figure 2-3. 3.3V Pullup for SDA and SCL on BQ76952EVM......................................................................................................
Figure 2-4. 3.3V Pullup for SDA and SCL on
Figure 3-1. Software Project View...............................................................................................................................................
Figure 3-2. SYSCFG_DL_init () Function....................................................................................................................................
Figure 3-3. SYSCFG_DL_I2C_0_init ()
Figure 3-4. Sysconfig Setting
Figure 3-5. Basic Communication Functions...............................................................................................................................
Figure 3-6. Basic Functions of BQ769x2.....................................................................................................................................
Figure 3-7. Measurement Commands of BQ769x2.....................................................................................................................
Figure 3-8. Read Results of
Figure 4-1. Captured I2C Waveform for Alarm Status
Figure 4-2. Captured I2C Waveform for Safety Status Reading................................................................................................
Figure 4-3. Captured I2C Waveform for PF Status Reading.....................................................................................................
Figure 4-4. Captured I2C Waveform for Current Reading.........................................................................................................
Figure 4-5. I2C Waveform for TS Temperature Reading...........................................................................................................
Figure 4-6. Register Values for TS Temperature Reading.........................................................................................................
Figure 4-7. Captured I2C Waveform for Cell Voltage Reading..................................................................................................
Figure 4-8. Register Values for Cell Voltage
SLAAEB3A - MAY 2023 - REVISED JULY 2024
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ABSTRACT

Table of Contents

Functions.......................................................................................................................6
Control.............................................................................................................................................8
Functions.....................................................................................................................................10
List of Figures
MSPM0L1306.......................................................................................................5
Function.........................................................................................................................7
Interface........................................................................................................................................7
BQ769x2.........................................................................................................................................9
Reading.................................................................................................10
Reading................................................................................................................15
Copyright © 2024 Texas Instruments Incorporated
Board......................................................................................4
BQ769x2 Control Based on MSPM0 Through I2C
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