esp-idf/docs/zh_CN/api-reference/peripherals/gpio/esp32s2.inc

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.. gpio-summary

{IDF_TARGET_NAME} 芯片具有 43 个物理 GPIO 管脚（GPIO0 ~ GPIO21 和 GPIO26 ~ GPIO46）。每个管脚都可用作一个通用 IO，或连接一个内部的外设信号。通过 IO MUX、RTC IO MUX 和 GPIO 交换矩阵，可配置外设模块的输入信号来源于任何的 IO 管脚，并且外设模块的输出信号也可连接到任意 IO 管脚。这些模块共同组成了芯片的 IO 控制。更多详细信息，请参阅 *{IDF_TARGET_NAME} 技术参考手册* > *IO MUX 和 GPIO 矩阵（GPIO、IO_MUX）* [`PDF <{IDF_TARGET_TRM_CN_URL}#iomuxgpio>`__]。

下表提供了各管脚的详细信息，部分 GPIO 具有特殊的使用限制，具体可参考表中的注释列。

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

    * - GPIO
      - 模拟功能
      - RTC GPIO
      - 注释

    * - GPIO0
      -
      - RTC_GPIO0
      - Strapping 管脚

    * - GPIO1
      - ADC1_CH0
      - RTC_GPIO1
      -

    * - GPIO2
      - ADC1_CH1
      - RTC_GPIO2
      -

    * - GPIO3
      - ADC1_CH2
      - RTC_GPIO3
      -

    * - 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
      -

    * - GPIO20
      - ADC2_CH9
      - RTC_GPIO20
      -

    * - 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
      -
      -
      -

    * - GPIO34
      -
      -
      -

    * - GPIO35
      -
      -
      -

    * - GPIO36
      -
      -
      -

    * - GPIO37
      -
      -
      -

    * - GPIO38
      -
      -
      -

    * - GPIO39
      -
      -
      - JTAG

    * - GPIO40
      -
      -
      - JTAG

    * - GPIO41
      -
      -
      - JTAG

    * - GPIO42
      -
      -
      - JTAG

    * - GPIO43
      -
      -
      -

    * - GPIO44
      -
      -
      -

    * - GPIO45
      -
      -
      - Strapping 管脚

    * - GPIO46
      -
      -
      - GPI；Strapping 管脚

.. note::

    - Strapping 管脚：GPIO0、GPIO45、和 GPIO46 是 Strapping 管脚。更多信息请参考 `ESP32-S2 技术规格书 <{IDF_TARGET_DATASHEET_CN_URL}>`_。
    - SPI0/1：GPIO26-32 通常用于 SPI flash 和 PSRAM，不推荐用于其他用途。
    - JTAG：GPIO39-42 通常用于在线调试。
    - GPI：GPIO46 固定为下拉，只能设置为输入模式。

---