SDAA116 October   2025 CC2340R5

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 CC2340R5
    2. 1.2 DRV8251A
    3. 1.3 BDC Motor
    4. 1.4 TMAG5213
  5. 2BDC Application
    1. 2.1 Hardware Setup
      1. 2.1.1 DRV8251AEVM Settings
    2. 2.2 Connection Diagram
  6. 3Running the Example
    1. 3.1 Dependencies
    2. 3.2 Loading Firmware
    3. 3.3 Zigbee Network Formation
  7. 4Firmware Design
    1. 4.1 Code Flow Description
    2. 4.2 LaunchPad Button Functionality
    3. 4.3 Non-Volatile Memory
    4. 4.4 Bidirectional PWM Motor Control
    5. 4.5 ADC Overcurrent Protection Feature
    6. 4.6 Hall-Effect Based Motor Position Tracking Feature with Configurable Endpoints
    7. 4.7 Logging Functionality
    8. 4.8 Interoperability with Third-Party Smart Hub Devices
  8. 5Tests and Results
    1. 5.1 PWM and Hall-effect Signal Analysis
    2. 5.2 Power Consumption Analysis with EnergyTrace™
  9. 6Summary
  10. 7References

4.3 Non-Volatile Memory

Non-volatile (NV) Flash memory is implemented to save both the high and low endpoints as well as the current motor rotation position whenever a new value is recorded. Therefore, when the device is power cycled or reset these variables are restored to the former values. High and low endpoints must be re-established through pushbutton operations each time the device erases flash memory, such as during a programming operation. NV memory is only used when USE_HALL is defined, and cannot account for any physical motor rotation position changes that occur while the CC2340R5 device is not running.