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Merge branch 'bugfix/warn_rc32k_use_in_kconfig_v5.4' into 'release/v5.4'

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fix(clk): add an inevitable kconfig option to be selected to use rc32k (v5.4)

See merge request espressif/esp-idf!35285
This commit is contained in:
Michael (XIAO Xufeng)
2024-12-11 23:39:34 +08:00
parent 183834a82c 623351e791
commit 0f1bec184d
13 changed files with 15 additions and 43 deletions
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6
docs/en/api-reference/peripherals/clk_tree.rst
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@@ -79,12 +79,6 @@ Root clocks generate reliable clock signals. These clock signals then pass throu
A clock signal generated by an external circuit can be connected to {IDF_TARGET_OSC_SLOW_PIN} to be the clock source for the ``RTC_SLOW_CLK``. This clock can also be calibrated to get its exact frequency.
.. only:: SOC_CLK_RC32K_SUPPORTED
- Internal 32 kHz RC Oscillator (RC32K)
The exact frequency of this clock can be computed in runtime through calibration.
Typically, the frequency of the signal generated from an RC oscillator circuit is less accurate and more sensitive to the environment compared to the signal generated from a crystal. {IDF_TARGET_NAME} provides several clock source options for the ``RTC_SLOW_CLK``, and it is possible to make the choice based on the requirements for system time accuracy and power consumption. For more details, please refer to :ref:`rtc-clock-source-choice`.
Module Clocks

2
docs/en/api-reference/system/system_time.rst
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@@ -46,8 +46,6 @@ The RTC timer has the following clock sources:
:not esp32c5 and not esp32c6 and not esp32h2 and not esp32p4: - ``Internal {IDF_TARGET_INT_OSC_FRE} oscillator, divided by 256 ({IDF_TARGET_INT_OSC_FRE_DIVIDED})``: Provides better frequency stability than the ``Internal {IDF_TARGET_RTC_CLK_FRE} RC oscillator`` at the expense of a higher (by 5 μA) Deep-sleep current consumption. It also does not require external components.
:esp32c5 or esp32c6 or esp32h2 or esp32p4: - ``Internal 32 kHz RC oscillator``
The choice depends on your requirements for system time accuracy and power consumption in sleep modes. To modify the RTC clock source, set :ref:`CONFIG_RTC_CLK_SRC` in project configuration.
More details about the wiring requirements for the external crystal or external oscillator, please refer to the `Hardware Design Guidelines <https://docs.espressif.com/projects/esp-hardware-design-guidelines/en/latest/{IDF_TARGET_PATH_NAME}>`_.