esp-idf/components/esp_psram/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_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_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_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_psram/Kconfig.spiram.common" # insert non-chip-specific items here
endmenu