esp-idf/components/esp_psram/esp32s3/Kconfig.spiram

config SPIRAM
    bool "Support for external, SPI-connected RAM"
    default "n"
    help
        This enables support for an external SPI RAM chip, connected in parallel with the
        main SPI flash chip.

menu "SPI RAM config"
    depends on SPIRAM

    choice SPIRAM_MODE
        prompt "Mode (QUAD/OCT) of SPI RAM chip in use"
        default SPIRAM_MODE_QUAD

        config SPIRAM_MODE_QUAD
            bool "Quad Mode PSRAM"

        config SPIRAM_MODE_OCT
            bool "Octal Mode PSRAM"
    endchoice

    choice SPIRAM_TYPE
        prompt "Type of SPIRAM chip in use"
        default SPIRAM_TYPE_AUTO

        config SPIRAM_TYPE_AUTO
            bool "Auto-detect"

        config SPIRAM_TYPE_ESPPSRAM16
            bool "ESP-PSRAM16 or APS1604"
            depends on SPIRAM_MODE_QUAD

        config SPIRAM_TYPE_ESPPSRAM32
            bool "ESP-PSRAM32"
            depends on SPIRAM_MODE_QUAD

        config SPIRAM_TYPE_ESPPSRAM64
            bool "ESP-PSRAM64 , LY68L6400 or APS6408"
    endchoice

    config SPIRAM_ALLOW_STACK_EXTERNAL_MEMORY
        bool "Allow external memory as an argument to xTaskCreateStatic"
        default y
        help
            Accessing memory in SPIRAM has certain restrictions, so task stacks allocated by xTaskCreate
            are by default allocated from internal RAM.

            This option allows for passing memory allocated from SPIRAM to be passed to xTaskCreateStatic.
            This should only be used for tasks where the stack is never accessed while the cache is disabled.

    config SPIRAM_CLK_IO
        int
        default 30

    config SPIRAM_CS_IO
        int
        default 26

    config SPIRAM_XIP_FROM_PSRAM
        bool "Enable Executable in place from (XiP) from PSRAM feature"
        default n
        select SPIRAM_FETCH_INSTRUCTIONS
        select SPIRAM_RODATA
        help
            Helper for selecting both `SPIRAM_FETCH_INSTRUCTIONS` and `SPIRAM_RODATA`

    config SPIRAM_FETCH_INSTRUCTIONS
        bool "Move Instructions in Flash to PSRAM"
        default n
        help
            If enabled, instructions in flash will be moved into PSRAM on startup.
            If SPIRAM_RODATA is also enabled, code that requires execution during an MSPI1 Flash operation
            can forgo being placed in IRAM. Therefore codes that need to be executing during Flash
            operation can continue working normally.

            This feature is useful for high throughput peripheral involved applications to improve
            the performance during MSPI1 flash operations. PSRAM access speed is faster than Flash access.
            So the performance is better. (see External RAM documentation for more details).

    config SPIRAM_RODATA
        bool "Move Read-Only Data in Flash to PSRAM"
        default n
        help
            If enabled, rodata in flash will be moved into PSRAM on startup.
            If SPIRAM_FETCH_INSTRUCTIONS is also enabled, code that requires execution during an MSPI1 Flash operation
            is not necessary to be placed in IRAM. Therefore codes that need to be executing during Flash
            operation can continue working normally.

            This feature is useful for high throughput peripheral involved applications to improve
            the performance during MSPI1 flash operations. PSRAM access speed is faster than Flash access.
            So the performance is better. (see External RAM documentation for more details).

    choice SPIRAM_SPEED
        prompt "Set RAM clock speed"
        default SPIRAM_SPEED_40M
        help
            Select the speed for the SPI RAM chip.

        config SPIRAM_SPEED_120M
            depends on SPIRAM_MODE_QUAD || IDF_EXPERIMENTAL_FEATURES
            bool "120MHz clock speed (READ DOCS FIRST)"

            help
                - Quad PSRAM 120 MHz is stable.

                - Octal PSRAM 120 MHz is an experimental feature, it works when
                  the temperature is stable.

                    Risks:
                        If your chip powers on at a certain temperature, then after the temperature
                        increases or decreases by approximately 20 Celsius degrees (depending on the
                        chip), the accesses to / from PSRAM will crash randomly.

        config SPIRAM_SPEED_80M
            bool "80MHz clock speed"
        config SPIRAM_SPEED_40M
            bool "40Mhz clock speed"
    endchoice

    config SPIRAM_SPEED
        int
        default 120 if SPIRAM_SPEED_120M
        default 80 if SPIRAM_SPEED_80M
        default 40 if SPIRAM_SPEED_40M

    config SPIRAM_ECC_ENABLE
        bool "Enable SPI RAM ECC"
        default n
        depends on SPIRAM_MODE_OCT
        help
            Enable MSPI Error-Correcting Code function when accessing SPIRAM.

            If enabled, 1/16 of the SPI RAM total size will be reserved for error-correcting code.

    source "$IDF_PATH/components/esp_psram/Kconfig.spiram.common"    # insert non-chip-specific items here
endmenu