diff --git a/docs/en/api-reference/system/sleep_modes.rst b/docs/en/api-reference/system/sleep_modes.rst
index 26fe243210..bf745fabfd 100644
--- a/docs/en/api-reference/system/sleep_modes.rst
+++ b/docs/en/api-reference/system/sleep_modes.rst
@@ -90,7 +90,7 @@ In Deep-sleep mode, the CPUs, most of the RAM, and all digital peripherals that
 
     Features:
 
-    1. RTC IO input/RTC memory at high temperature (experimental): Use RTC IO as input pins, or use RTC memory at high temperature. The chip can go into ultra low power mode when these features are disabled. Controlled by API :cpp:func:`rtc_sleep_enable_ultra_low`.
+    1. RTC IO input/RTC memory at high temperature (experimental): Use RTC IO as input pins, or use RTC memory at high temperature. The chip can go into ultra low power mode when these features are disabled. Controlled by API :cpp:func:`esp_sleep_sub_mode_config` with `ESP_SLEEP_ULTRA_LOW_MODE` argument.
 
     2. ADC_TSEN_MONITOR: Use ADC/Temperature Sensor in monitor mode (controlled by ULP). Enabled by API :cpp:func:`ulp_adc_init` or its higher level APIs. Only available for ESP32-S2 and ESP32-S3 chips with monitor mode.
 
diff --git a/docs/zh_CN/api-reference/system/sleep_modes.rst b/docs/zh_CN/api-reference/system/sleep_modes.rst
index 61086b8cbe..1e941347b8 100644
--- a/docs/zh_CN/api-reference/system/sleep_modes.rst
+++ b/docs/zh_CN/api-reference/system/sleep_modes.rst
@@ -90,7 +90,7 @@
 
     功能：
 
-    1. RTC IO 输入/高温下 RTC 内存（试验功能）：将 RTC IO 用作输入管脚，或在高温下使用 RTC 内存。禁用上述功能，芯片可进入超低功耗模式。由 API :cpp:func:`rtc_sleep_enable_ultra_low` 控制。
+    1. RTC IO 输入/高温下 RTC 内存（试验功能）：将 RTC IO 用作输入管脚，或在高温下使用 RTC 内存。禁用上述功能，芯片可进入超低功耗模式。由 API :cpp:func:`esp_sleep_sub_mode_config` 配置 `ESP_SLEEP_ULTRA_LOW_MODE` 模式的使能与关闭。
 
     2. ADC_TSEN_MONITOR：在 monitor 模式下使用 ADC/温度传感器（由 ULP 控制），通过 :cpp:func:`ulp_adc_init` 或其更高级别的 API 启用。仅适用于支持 monitor 模式的 ESP32-S2 和 ESP32-S3 芯片。