Help¶

The PSRAM CS IO can be any unused GPIO, user can config it based on hardware design.

For ESP32-PICO chip, the psram share clock with flash, so user do not need to configure the clock
IO.
For the reference hardware design, please refer to
https://www.espressif.com/sites/default/files/documentation/esp32-pico-d4_datasheet_en.pdf

Direct dependencies¶

ESP_SPIRAM && SOC_ESP32 && <choice: SoC/CPU/Configuration Selection>

(Includes any dependencies from ifs and menus.)

Default¶

10

Kconfig definition¶

At <Zephyr>/soc/xtensa/esp32/Kconfig.soc:151

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:28 → <Zephyr>/soc/Kconfig:6 → <BuildDir>/kconfig/Kconfig.soc:1

Menu path: (Top) → SoC/CPU/Configuration Selection → ESP32 → Support for external, SPI-connected RAM → SPI RAM config → PSRAM clock and cs IO for ESP32-PICO

config PICO_PSRAM_CS_IO
    int "PSRAM CS IO number"
    range 0 33
    default 10
    depends on ESP_SPIRAM && SOC_ESP32 && <choice>
    help
      The PSRAM CS IO can be any unused GPIO, user can config it based on hardware design.

      For ESP32-PICO chip, the psram share clock with flash, so user do not need to configure the clock
      IO.
      For the reference hardware design, please refer to
      https://www.espressif.com/sites/default/files/documentation/esp32-pico-d4_datasheet_en.pdf

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)