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 information, please refer to `ESP32-S3 datasheet <{IDF_TARGET_DATASHEET_EN_URL}>`_.
    - SPI0/1: GPIO26 ~ GPIO32 are usually used for SPI flash and PSRAM and not recommended for other uses. When using Octal flash or Octal PSRAM or both, GPIO33 ~ GPIO37 are connected to SPIIO4 ~ SPIIO7 and SPIDQS. Therefore, on boards embedded with ESP32-S3R8 / ESP32-S3R8V chip, GPIO33 ~ GPIO37 are also not recommended for other uses.
    - USB-JTAG: GPIO19 and GPIO20 are used by USB-JTAG by default. If they are reconfigured to operate as normal GPIOs, USB-JTAG functionality will be disabled.

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