SWRA486A August   2015  – April 2017 CC1310 , CC2620 , CC2630 , CC2640 , CC2640R2F-Q1 , CC2650 , CC2650MODA

 

  1.   CC26x0, CC13x0 SimpleLink™ Wireless MCU Power Management Software Development
    1.     Trademarks
  2.   CC26x0, CC13x0 SimpleLink™ Wireless MCU Power Management Software Development
    1. 1 Abbreviations
    2. 2 Power Management Introduction
    3. 3 TI-RTOS Power Modes
      1. 3.1 Active Mode
      2. 3.2 Idle Mode
      3. 3.3 Standby Mode
        1. 3.3.1 Standby Enter Sequence
        2. 3.3.2 Standby Exit Sequence
      4. 3.4 Shutdown Mode
    4. 4 Implementation Considerations
      1. 4.1 Device Initializing
        1. 4.1.1 Low-Level Initializing
        2. 4.1.2 Initializating TI-RTOS
      2. 4.2 Recharging in Standby
      3. 4.3 Operating the DC-DC Converter
      4. 4.4 Configuring Device for External Input Interrupts and Wakeup
        1. 4.4.1 Interrupt and Wakeup from Active, Idle, and Standby
        2. 4.4.2 Wakeup from Shutdown Mode
      5. 4.5 Oscillators
        1. 4.5.1 High-Frequency Oscillators
        2. 4.5.2 Low-Frequency Oscillators
        3. 4.5.3 RC Oscillator Calibration
      6. 4.6 Auxiliary Domain
        1. 4.6.1 Powering on the Auxiliary Domain
        2. 4.6.2 Powering Down the Auxiliary Domain
        3. 4.6.3 Managing the Sensor Controller and the Auxiliary Domain Power
        4. 4.6.4 Sharing Resources Between the Sensor Controller and the Cortex®-M3
      7. 4.7 RTC
        1. 4.7.1 Initializing RTC
        2. 4.7.2 Configuring RTC Compare Events
      8. 4.8 Debugging Through Power Modes
      9. 4.9 Using Peripherals
    5. 5 References
  3.   Revision History

4.3 Operating the DC-DC Converter

The CC26x0 and CC13x0 device families have an on-chip DC-DC converter which enables low-power applications. The DC-DC converter is enabled by trimDevice() based on the CCFG fields in Figure 12, and has a separate enable field for operating in active and standby modes (the hardware periodically recharges in standby mode). When the device operates in external regulator mode, disable the DC-DC converter during active and standby/recharge modes.

Figure_12_SWRA486.pngFigure 12. CCFG Fields For Enabling the DC-DC Converter During Active and Standby Mode

Because the DC-DC converter only operates with optimum efficiency at high VDDS voltages, turn off the DC-DC converter when VDDS decreases. To configure the voltage threshold to turn off the DC-DC converter, use the CCFG field in Figure 13. Do not modify this voltage threshold.

Figure_13_SWRA486.pngFigure 13. The Voltage Threshold For Turning Off the DC-DC Converter

The application uses the function in Figure 14, the threshold configured in the CCFG field, to decide when to turn off the DC-DC converter. The application calls this function at periodic intervals. This function also turns on the DC-DC converter if the voltage exceeds the threshold (for example, when the battery is recharging).

Figure_14_SWRA486.pngFigure 14. The Driverlib Function That Enables and Disables the DC-DC Converter at the Given CCFG Threshold