esp-idf/docs/en/api-reference/peripherals/gpio/esp32s3.inc

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.. gpio-summary

The {IDF_TARGET_NAME} chip features 45 physical GPIO pins (GPIO0 ~ GPIO21 and GPIO26 ~ GPIO48). Each pin can be used as a general-purpose I/O, or be connected to an internal peripheral signal. Through GPIO matrix, IO MUX, and RTC IO MUX, peripheral input signals can be from any GPIO pin, and peripheral output signals can be routed to any GPIO pin. Together these modules provide highly configurable I/O. For more details, see *{IDF_TARGET_NAME} Technical Reference Manual* > *IO MUX and GPIO Matrix (GPIO, IO_MUX)* [`PDF <{IDF_TARGET_TRM_EN_URL}#iomuxgpio>`__].

The table below provides more information on pin usage, and please note the comments in the table for GPIOs with restrictions.

.. list-table::
    :header-rows: 1
    :widths: 8 12 12 20

    * - GPIO
      - Analog Function
      - RTC GPIO
      - Comment

    * - GPIO0
      -
      - RTC_GPIO0
      - Strapping pin

    * - GPIO1
      - ADC1_CH0
      - RTC_GPIO1
      -

    * - GPIO2
      - ADC1_CH1
      - RTC_GPIO2
      -

    * - GPIO3
      - ADC1_CH2
      - RTC_GPIO3
      - Strapping pin

    * - GPIO4
      - ADC1_CH3
      - RTC_GPIO4
      -

    * - GPIO5
      - ADC1_CH4
      - RTC_GPIO5
      -

    * - GPIO6
      - ADC1_CH5
      - RTC_GPIO6
      -

    * - GPIO7
      - ADC1_CH6
      - RTC_GPIO7
      -

    * - GPIO8
      - ADC1_CH7
      - RTC_GPIO8
      -

    * - GPIO9
      - ADC1_CH8
      - RTC_GPIO9
      -

    * - GPIO10
      - ADC1_CH9
      - RTC_GPIO10
      -

    * - GPIO11
      - ADC2_CH0
      - RTC_GPIO11
      -

    * - GPIO12
      - ADC2_CH1
      - RTC_GPIO12
      -

    * - GPIO13
      - ADC2_CH2
      - RTC_GPIO13
      -

    * - GPIO14
      - ADC2_CH3
      - RTC_GPIO14
      -

    * - GPIO15
      - ADC2_CH4
      - RTC_GPIO15
      -

    * - GPIO16
      - ADC2_CH5
      - RTC_GPIO16
      -

    * - GPIO17
      - ADC2_CH6
      - RTC_GPIO17
      -

    * - GPIO18
      - ADC2_CH7
      - RTC_GPIO18
      -

    * - GPIO19
      - ADC2_CH8
      - RTC_GPIO19
      - USB-JTAG

    * - GPIO20
      - ADC2_CH9
      - RTC_GPIO20
      - USB-JTAG

    * - GPIO21
      -
      - RTC_GPIO21
      -

    * - GPIO26
      -
      -
      - SPI0/1

    * - GPIO27
      -
      -
      - SPI0/1

    * - GPIO28
      -
      -
      - SPI0/1

    * - GPIO29
      -
      -
      - SPI0/1

    * - GPIO30
      -
      -
      - SPI0/1

    * - GPIO31
      -
      -
      - SPI0/1

    * - GPIO32
      -
      -
      - SPI0/1

    * - GPIO33
      -
      -
      - SPI0/1

    * - GPIO34
      -
      -
      - SPI0/1

    * - GPIO35
      -
      -
      - SPI0/1

    * - GPIO36
      -
      -
      - SPI0/1

    * - GPIO37
      -
      -
      - SPI0/1

    * - GPIO38
      -
      -
      -

    * - GPIO39
      -
      -
      -

    * - GPIO40
      -
      -
      -

    * - GPIO41
      -
      -
      -

    * - GPIO42
      -
      -
      -

    * - GPIO43
      -
      -
      -

    * - GPIO44
      -
      -
      -

    * - GPIO45
      -
      -
      - Strapping pin

    * - GPIO46
      -
      -
      - Strapping pin

    * - GPIO47
      -
      -
      -

    * - GPIO48
      -
      -
      -

.. Note::

    - Strapping pin: GPIO0, GPIO3, GPIO45 and GPIO46 are strapping pins. For more infomation, please refer to `ESP32-S3 datasheet <https://www.espressif.com/sites/default/files/documentation/esp32-s3_datasheet_en.pdf>`_.
    - SPI0/1: GPIO26-32 are usually used for SPI flash and PSRAM and not recommended for other uses. When using Octal Flash or Octal PSRAM or both, GPIO33~37 are connected to SPIIO4 ~ SPIIO7 and SPIDQS. Therefore, on boards embedded with ESP32-S3R8 / ESP32-S3R8V chip, GPIO33~37 are also not recommended for other uses.
    - USB-JTAG: GPIO 19 and 20 are used by USB-JTAG by default. In order to use them as GPIOs, USB-JTAG will be disabled by the drivers.

---