SWRU640 March   2026

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
      1. 1.4.1 CC2662R-Q1
      2. 1.4.2 BQ79718B-Q1
      3. 1.4.3 TPS3436-Q1
      4. 1.4.4 TPS715-Q1
      5. 1.4.5 TXU0204-Q1
      6. 1.4.6 LM5168-Q1
  8. 2Hardware
    1. 2.1 Power Requirements
      1. 2.1.1 Powering with Batteries and Wiring Harness
      2. 2.1.2 Powering with Source Meter/External Supply and Using the Resistor Ladder
    2. 2.2 Temperature Range
    3. 2.3 Programming, Debug, and Control
      1. 2.3.1 Using a Generic XDS110 Debug Probe, Including a Separate LaunchPad
    4. 2.4 Interfaces
      1. 2.4.1 Debug Interface Connector
      2. 2.4.2 BQ Daisy Chain Interface
    5. 2.5 Jumpers
    6. 2.6 General Features
      1. 2.6.1 BQ DCDC Converter (LM5168-Q1)
      2. 2.6.2 BQ Voltage References
      3. 2.6.3 BQ Resistor Ladder
      4. 2.6.4 BQ Busbar
      5. 2.6.5 CC2662R-Q1 LDO
      6. 2.6.6 CC2662R-Q1 Watchdog
      7. 2.6.7 BQ to Wireless MCU Level Shifter
      8. 2.6.8 Status LEDs
    7. 2.7 Advanced Use of the EVM Hardware
      1. 2.7.1 Base or Stack
      2. 2.7.2 Ring Architecture
      3. 2.7.3 Busbar Position
      4. 2.7.4 Radiated/Conducted Testing
      5. 2.7.5 Communication Isolation
  9. 3Software
    1. 3.1 Software Development
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Compliance Information
    1. 5.1 CE Compliance
    2. 5.2 REACH Compliance
    3. 5.3 Waste Electrical and Electronic Equipment (WEEE) Compliance
  12. 6Additional Information
    1. 6.1 Known Hardware or Software Issues
    2. 6.2 Trademarks
    3. 6.3 Terminology
  13. 7References

2.4.2 BQ Daisy Chain Interface

Figure 2-8 shows the Daisy Chain interface, also known as the Vertical Interface (VIF) portion of the EVM. This interface allows the user to connect multiple CSU boards in a daisy chain configuration via daisy chain cables also shown in Figure 2-8.

CC2662RQ1-CSU-EVM BQ Daisy Chain Interface and Cable Figure 2-8 BQ Daisy Chain Interface and Cable

The board designated to communicate wirelessly with the wireless main MCU in a WBMS network is considered the base device. This base device is responsible for collecting data from all stacked devices and transmitting the data wirelessly to the wireless main device. The wireless main device can then interface with a host MCU or PC to then transfer the data to the user via a Graphical User Interface (GUI) or through UART/SPI data packets.

To configure multiple boards in a daisy chain configuration, the user will connect the daisy chain cable between COMH of the base device and COML of the next device in the daisy chain, which will be considered stack 1 or “S1”. This COMH to COML connection configuration will continue down the daisy chain between S1 and S2, and so on.

CC2662RQ1-CSU-EVM BQ Isolation Circuitry for VIF Communication Figure 2-9 BQ Isolation Circuitry for VIF Communication

Figure 2-9 shows the isolation portion of the VIF communication interface. This section contains series and termination resistors, Transient Voltage Suppressor (TVS) diodes, and isolation capacitors to keep the device protected from any noise that may be induced onto the communication lines.