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Calendar

Calendar Partially Functions Abnormally

  • Description

    When the internal RC clock is used as the slow-speed system clock, the calendar calibration fails, and the Calendar module cannot work properly.

  • Cause

    During hardware design, the Calendar module is not expected to support using the internal RC clock as the clock source.

  • Impact

    There is no clock input, so calendar calibration fails, and the Calendar module cannot work properly.

  • Recommended Workaround

    Note that when the internal RC clock is chosen (in custom_config.h) as the slow-speed system clock, both the app_rtc and alarm cannot work properly. To avoid this limitation, you can choose 32K RTC as the slow-speed system clock.

Note:

The recommended workaround is available on GR551x SDK V1.6.06 and later versions.

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