diff --git a/docs/en/api-guides/memory-types.rst b/docs/en/api-guides/memory-types.rst
index d7c94fc6b4..9ea167aa15 100644
--- a/docs/en/api-guides/memory-types.rst
+++ b/docs/en/api-guides/memory-types.rst
@@ -175,16 +175,16 @@ The ``DRAM_ATTR`` attribute can be used to force constants from DROM into the :r
 
     .. only:: esp32
 
-        RTC FAST memory can only be accessed by the PRO CPU.
+        In single core mode (:ref:`CONFIG_FREERTOS_UNICORE`), remaining RTC FAST memory is added to the heap, unless the option :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` is disabled. This memory can be used interchangeably with :ref:`DRAM`, but is slightly slower to access and not DMA-capable.
 
-        In single core mode, remaining RTC FAST memory is added to the heap unless the option :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` is disabled. This memory can be used interchangeably with :ref:`DRAM`, but is slightly slower to access and not DMA capable.
+        This option is not available in dual core mode, because on {IDF_TARGET_NAME}, RTC FAST memory can only be accessed by the PRO CPU.
 
     .. only:: not esp32
 
         Remaining RTC FAST memory is added to the heap unless the option :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` is disabled. This memory can be used interchangeably with :ref:`DRAM`, but is slightly slower to access.
 
 
-DMA Capable Requirement
+DMA-Capable Requirement
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 .. highlight:: c
diff --git a/docs/zh_CN/api-guides/memory-types.rst b/docs/zh_CN/api-guides/memory-types.rst
index f900a6e679..040712690a 100644
--- a/docs/zh_CN/api-guides/memory-types.rst
+++ b/docs/zh_CN/api-guides/memory-types.rst
@@ -175,9 +175,9 @@ DROM（数据存储在 flash 中）
 
     .. only:: esp32
 
-        RTC FAST memory 只可以被 PRO CPU 访问。
+        在单核模式下 (:ref:`CONFIG_FREERTOS_UNICORE`)，除非禁用 :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` 选项，否则剩余的 RTC FAST memory 会被添加到堆中。该部分内存可以和 :ref:`DRAM` 互换使用，但是访问速度稍慢，且不具备 DMA 功能。
 
-        在单核模式下，除非禁用 :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` 选项，否则剩余的 RTC FAST memory 会被添加到堆中。该部分内存可以和 :ref:`DRAM` 互换使用，但是访问速度稍慢，且不具备 DMA 功能。
+        :ref:`CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP` 选项在双核模式下不可用，因为 {IDF_TARGET_NAME} 的 RTC FAST memory 只能由 PRO CPU 访问。
 
     .. only:: not esp32