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

4.5.3 RC Oscillator Calibration

Both the RCOSC_HF and RCOSC_LF frequency shift when the temperature changes and the oscillators age. Calibrate these oscillators periodically against the XOSC_HF.

Calibrating the RCOSC_HF gives more accurate timing when running the system off this clock and starts up the XOSC_HF faster. Calibrating the RCOSC_LF gives more accurate timing for the RTC when in standby. If the RCOSC_LF is unused by the application, calibrating this oscillator is unnecessary.

The auxiliary domain contains a TDC you can use to calibrate these oscillators against the XOSC_HF. TI-RTOS contains an implementation of calibrating both the RCOSC_HF and RCOSC_LF and can be a reference for those who must calibrate RC oscillators without TI-RTOS. The following implementation is in the TI-RTOS installation:

C:\ti\tirtos_cc13xx_cc26xx_#_##_##_##\products\tidrivers_cc13xx_cc26xx_#_##_##_##\packages\ti\drivers\power\Power_calibrateRCOSC.c.