esp-idf/components/esp_system/port/soc/esp32s2/Kconfig.memory

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menu "Memory"
config ESP32S2_RTCDATA_IN_FAST_MEM
bool "Place RTC_DATA_ATTR and RTC_RODATA_ATTR variables into RTC fast memory segment"
default n
help
This option allows to place .rtc_data and .rtc_rodata sections into
RTC fast memory segment to free the slow memory region for ULP programs.
config ESP32S2_USE_FIXED_STATIC_RAM_SIZE
bool "Use fixed static RAM size"
default n
help
If this option is disabled, the DRAM part of the heap starts right after the .bss section,
within the dram0_0 region. As a result, adding or removing some static variables
will change the available heap size.
If this option is enabled, the DRAM part of the heap starts right after the dram0_0 region,
where its length is set with ESP32S2_FIXED_STATIC_RAM_SIZE
config ESP32S2_FIXED_STATIC_RAM_SIZE
hex "Fixed Static RAM size"
default 0x10000
range 0 0x34000
depends on ESP32S2_USE_FIXED_STATIC_RAM_SIZE
help
RAM size dedicated for static variables (.data & .bss sections).
endmenu # Memory