esp-idf/components/esp_hw_support/port/esp32s2/Kconfig.spiram

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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
config SPIRAM_ALLOW_STACK_EXTERNAL_MEMORY
bool
default "y"
config SPIRAM_MODE_QUAD
bool
default "y"
choice SPIRAM_TYPE
prompt "Type of SPI RAM chip in use"
default SPIRAM_TYPE_AUTO
config SPIRAM_TYPE_AUTO
bool "Auto-detect"
config SPIRAM_TYPE_ESPPSRAM16
bool "ESP-PSRAM16 or APS1604"
config SPIRAM_TYPE_ESPPSRAM32
bool "ESP-PSRAM32"
config SPIRAM_TYPE_ESPPSRAM64
bool "ESP-PSRAM64 or LY68L6400"
endchoice
config SPIRAM_SIZE
int
default -1 if SPIRAM_TYPE_AUTO
default 2097152 if SPIRAM_TYPE_ESPPSRAM16
default 4194304 if SPIRAM_TYPE_ESPPSRAM32
default 8388608 if SPIRAM_TYPE_ESPPSRAM64
default 0
menu "PSRAM clock and cs IO for ESP32S2"
depends on SPIRAM
config DEFAULT_PSRAM_CLK_IO
int "PSRAM CLK IO number"
range 0 33
default 30
help
The PSRAM CLOCK IO can be any unused GPIO, user can config it based on hardware design.
config DEFAULT_PSRAM_CS_IO
int "PSRAM CS IO number"
range 0 33
default 26
help
The PSRAM CS IO can be any unused GPIO, user can config it based on hardware design.
endmenu
config SPIRAM_FETCH_INSTRUCTIONS
bool "Cache fetch instructions from SPI RAM"
default n
help
If enabled, instruction in flash will be copied into SPIRAM.
If SPIRAM_RODATA also enabled,
you can run the instruction when erasing or programming the flash.
config SPIRAM_RODATA
bool "Cache load read only data from SPI RAM"
default n
help
If enabled, radata in flash will be copied into SPIRAM.
If SPIRAM_FETCH_INSTRUCTIONS also enabled,
you can run the instruction when erasing or programming the flash.
choice SPIRAM_SPEED
prompt "Set RAM clock speed"
default SPIRAM_SPEED_40M
help
Select the speed for the SPI RAM chip.
config SPIRAM_SPEED_80M
bool "80MHz clock speed"
config SPIRAM_SPEED_40M
bool "40Mhz clock speed"
config SPIRAM_SPEED_26M
bool "26Mhz clock speed"
config SPIRAM_SPEED_20M
bool "20Mhz clock speed"
endchoice
config SPIRAM_SPEED
int
default 80 if SPIRAM_SPEED_80M
default 40 if SPIRAM_SPEED_40M
default 40 if SPIRAM_SPEED_26M
default 40 if SPIRAM_SPEED_20M
source "$IDF_PATH/components/esp_hw_support/Kconfig.spiram.common" #insert non-chip-specific items here
endmenu