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docs: Makes the description for RTC fast as heap explicit

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Makes it explicit that to use rtc memory fast as heap,
ESP32 needs to be configured in single core mode.
This commit is contained in:
Euripedes Rocha 2023-07-31 14:48:59 +02:00
parent 02f5b9a898
commit c79d1afb24
1 changed files with 2 additions and 2 deletions
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docs/en/api-guides/memory-types.rst
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@ -175,9 +175,9 @@ 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 be 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 ESP32, RTC FAST memory can only be accessed by the PRO CPU.
.. only:: not esp32