esp-idf/docs/zh_CN/api-reference/system/inc/power_management_esp32c2.rst

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+---------------+---------------------------------------+-------------------------------------+
| CPU 最高频率 | 电源管理锁获取情况 | APB 频率和 CPU 频率 |
| | | |
+---------------+---------------------------------------+-------------------------------------+
| 120 | 获取 ``ESP_PM_CPU_FREQ_MAX`` | | CPU: 120 MHz |
| | | | APB: 40 Mhz |
+ +---------------------------------------+-------------------------------------+
| | | 获取 ``ESP_PM_APB_FREQ_MAX``, | | CPU: 80 MHz |
| | | 未获得 ``ESP_PM_CPU_FREQ_MAX`` | | APB: 40 Mhz |
+ +---------------------------------------+-------------------------------------+
| | 无 | 使用 :cpp:func:`esp_pm_configure` |
| | | 为二者设置最小值 |
+---------------+---------------------------------------+-------------------------------------+
| 80 | | 获取 ``ESP_PM_CPU_FREQ_MAX`` | | CPU: 80 MHz |
| | | 或 ``ESP_PM_APB_FREQ_MAX`` | | APB: 40 Mhz |
+ +---------------------------------------+-------------------------------------+
| | 无 | 使用 :cpp:func:`esp_pm_configure` |
| | | 为二者设置最小值 |
+---------------+---------------------------------------+-------------------------------------+