diff --git a/docs/docs_not_updated/esp32c2.txt b/docs/docs_not_updated/esp32c2.txt index ac983d95d8..33f57192a2 100644 --- a/docs/docs_not_updated/esp32c2.txt +++ b/docs/docs_not_updated/esp32c2.txt @@ -85,7 +85,6 @@ api-reference/storage/sdmmc api-reference/storage/mass_mfg api-reference/storage/index api-reference/peripherals/adc -api-reference/peripherals/gpio api-reference/peripherals/sdspi_host api-reference/peripherals/spi_slave api-reference/peripherals/lcd diff --git a/docs/en/api-reference/peripherals/gpio.rst b/docs/en/api-reference/peripherals/gpio.rst index 93a5e05523..11ce098cce 100644 --- a/docs/en/api-reference/peripherals/gpio.rst +++ b/docs/en/api-reference/peripherals/gpio.rst @@ -6,13 +6,13 @@ Overview .. only:: esp32 - The {IDF_TARGET_NAME} chip features 34 physical GPIO pads. Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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 {IDF_TARGET_NAME} chip features 35 physical GPIO pads (GPIO0 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. 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 + .. list-table:: + :header-rows: 1 + :widths: 8 12 12 20 * - GPIO - Analog Function @@ -22,173 +22,173 @@ Overview * - GPIO0 - ADC2_CH1 - RTC_GPIO11 - - Strapping pin + - Strapping pin * - GPIO1 - - - - - - TXD - + - + - + - TXD + * - GPIO2 - ADC2_CH2 - RTC_GPIO12 - - Strapping pin - + - Strapping pin + * - GPIO3 - - - - - - RXD - + - + - + - RXD + * - GPIO4 - ADC2_CH0 - RTC_GPIO10 - - - + - + * - GPIO5 - - - - - - Strapping pin - + - + - + - Strapping pin + * - GPIO6 - - - - - - SPI0/1 - + - + - + - SPI0/1 + * - GPIO7 - - - - - - SPI0/1 - + - + - + - SPI0/1 + * - GPIO8 - - - - - - SPI0/1 - + - + - + - SPI0/1 + * - GPIO9 - - - - - - SPI0/1 - + - + - + - SPI0/1 + * - GPIO10 - - - - - - SPI0/1 - + - + - + - SPI0/1 + * - GPIO11 - - - - - - SPI0/1 - + - + - + - SPI0/1 + * - GPIO12 - ADC2_CH5 - RTC_GPIO15 - - Strapping pin; JTAG - + - Strapping pin; JTAG + * - GPIO13 - ADC2_CH4 - RTC_GPIO14 - JTAG - + * - GPIO14 - ADC2_CH6 - RTC_GPIO16 - JTAG - + * - GPIO15 - ADC2_CH3 - RTC_GPIO13 - Strapping pin; JTAG - + * - GPIO16 - - - - + - + - - SPI0/1 - + * - GPIO17 - - - - + - + - - SPI0/1 - + * - GPIO18 - - - - - - - + - + - + - + * - GPIO19 - - - - + - + - - * - GPIO20 - - + - - - This pin is only available on ESP32-PICO-V3 chip package - + * - GPIO21 - - - - - - + - + - + * - GPIO22 - - - - - - + - + - + * - GPIO23 - - - - - - + - + - + * - GPIO25 - ADC2_CH8 - RTC_GPIO6 - - + * - GPIO26 - ADC2_CH9 - RTC_GPIO7 - - + * - GPIO27 - ADC2_CH7 - RTC_GPIO17 - - + * - GPIO32 - ADC1_CH4 - RTC_GPIO9 - - + * - GPIO33 - ADC1_CH5 - RTC_GPIO8 - - + * - GPIO34 - ADC1_CH6 - RTC_GPIO4 - GPI - + * - GPIO35 - ADC1_CH7 - RTC_GPIO5 - GPI - + * - GPIO36 - ADC1_CH0 - RTC_GPIO0 - GPI - + * - GPIO37 - ADC1_CH1 - RTC_GPIO1 - GPI - + * - GPIO38 - ADC1_CH2 - RTC_GPIO2 - GPI - + * - GPIO39 - ADC1_CH3 - RTC_GPIO3 @@ -197,367 +197,16 @@ Overview .. note:: - Strapping pin: GPIO0, GPIO2, GPIO5, GPIO12 (MTDI), and GPIO15 (MTDO) are strapping pins. For more infomation, please refer to `ESP32 datasheet `_. - - SPI0/1: GPIO6-11 and GPIO16-17 are usually connected to the SPI flash and PSRAM integrated on the module and therefore should not be used for other purposes. - - JTAG: GPIO12-15 are usually used for inline debug. + - SPI0/1: GPIO6-11 and GPIO16-17 are usually connected to the SPI flash and PSRAM integrated on the module and therefore should not be used for other purposes. + - JTAG: GPIO12-15 are usually used for inline debug. - GPI: GPIO34-39 can only be set as input mode and do not have software-enabled pullup or pulldown functions. - - TXD & RXD are usually used for flashing and debugging. + - TXD & RXD are usually used for flashing and debugging. - ADC2: ADC2 pins cannot be used when Wi-Fi is used. So, if you’re using Wi-Fi and you’re having trouble getting the value from an ADC2 GPIO, you may consider using an ADC1 GPIO instead, that should solve your problem. For more details, please refer to `ADC limitations `_. .. only:: esp32s2 - The {IDF_TARGET_NAME} chip features 43 physical GPIO pads. Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. - - 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 - - - - * - 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 pin - - * - GPIO46 - - - - - - GPI；Strapping pin - - .. note:: - - - Strapping pin: GPIO0, GPIO45 and GPIO46 are strapping pins. For more infomation, please refer to `ESP32-S2 datasheet `_ - - SPI0/1: GPIO26-32 are usually used for SPI flash and PSRAM and not recommended for other uses. - - JTAG: GPIO39-42 are usually used for inline debug. - - GPI: GPIO46 is fixed to pull-down and is input only. - - -.. only:: esp32c3 - - The {IDF_TARGET_NAME} chip features 22 physical GPIO pads. Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. - - 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: 12 12 22 - - * - GPIO - - Analog Function - - Comment - - * - GPIO0 - - ADC1_CH0 - - RTC - - * - GPIO1 - - ADC1_CH1 - - RTC - - * - GPIO2 - - ADC1_CH2 - - Strapping pin；RTC - - * - GPIO3 - - ADC1_CH3 - - RTC - - * - GPIO4 - - ADC1_CH4 - - RTC - - * - GPIO5 - - ADC2_CH0 - - RTC - - * - GPIO6 - - - - - - * - GPIO7 - - - - - - * - GPIO8 - - - - Strapping pin - - * - GPIO9 - - - - Strapping pin - - * - GPIO10 - - - - - - * - GPIO11 - - - - - - * - GPIO12 - - - - SPI0/1 - - * - GPIO13 - - - - SPI0/1 - - * - GPIO14 - - - - SPI0/1 - - * - GPIO15 - - - - SPI0/1 - - * - GPIO16 - - - - SPI0/1 - - * - GPIO17 - - - - SPI0/1 - - * - GPIO18 - - - - USB-JTAG - - * - GPIO19 - - - - USB-JTAG - - * - GPIO20 - - - - - - * - GPIO21 - - - - - - .. note:: - - - Strapping pin: GPIO2, GPIO8 and GPIO9 are strapping pins. For more infomation, please refer to `ESP32-C3 datasheet `_. - - SPI0/1: GPIO12-17 are usually used for SPI flash and PSRAM and not recommended for other uses. - - USB-JTAG: GPIO 18 and 19 are used by USB-JTAG by default. In order to use them as GPIOs, USB-JTAG will be disabled by the drivers. - - RTC: GPIO0-5 can be used when in deep sleep. - - - - -.. only:: esp32s3 - - The {IDF_TARGET_NAME} chip features 45 physical GPIO pads. Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. + The {IDF_TARGET_NAME} chip features 43 physical GPIO pads (GPIO0 ~ GPIO21 and GPIO26 ~ GPIO46). Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. The table below provides more information on pin usage, and please note the comments in the table for GPIOs with restrictions. @@ -569,231 +218,582 @@ Overview - 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 + - + + * - 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 pin + + * - GPIO46 + - + - + - GPI；Strapping pin + + .. note:: + + - Strapping pin: GPIO0, GPIO45 and GPIO46 are strapping pins. For more infomation, please refer to `ESP32-S2 datasheet `_ + - SPI0/1: GPIO26-32 are usually used for SPI flash and PSRAM and not recommended for other uses. + - JTAG: GPIO39-42 are usually used for inline debug. + - GPI: GPIO46 is fixed to pull-down and is input only. + + +.. only:: esp32c3 + + The {IDF_TARGET_NAME} chip features 22 physical GPIO pads (GPIO0 ~ GPIO21). Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. + + 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: 12 12 22 + + * - GPIO + - Analog Function + - Comment + + * - GPIO0 + - ADC1_CH0 + - RTC + + * - GPIO1 + - ADC1_CH1 + - RTC + + * - GPIO2 + - ADC1_CH2 + - Strapping pin；RTC + + * - GPIO3 + - ADC1_CH3 + - RTC + + * - GPIO4 + - ADC1_CH4 + - RTC + + * - GPIO5 + - ADC2_CH0 + - RTC + + * - GPIO6 + - + - + + * - GPIO7 + - + - + + * - GPIO8 + - + - Strapping pin + + * - GPIO9 + - + - Strapping pin + + * - GPIO10 + - + - + + * - GPIO11 + - + - + + * - GPIO12 + - + - SPI0/1 + + * - GPIO13 + - + - SPI0/1 + + * - GPIO14 + - + - SPI0/1 + + * - GPIO15 + - + - SPI0/1 + + * - GPIO16 + - + - SPI0/1 + + * - GPIO17 + - + - SPI0/1 + + * - GPIO18 + - + - USB-JTAG + + * - GPIO19 + - + - USB-JTAG + + * - GPIO20 + - + - + + * - GPIO21 + - + - + + .. note:: + + - Strapping pin: GPIO2, GPIO8 and GPIO9 are strapping pins. For more infomation, please refer to `ESP32-C3 datasheet `_. + - SPI0/1: GPIO12-17 are usually used for SPI flash and PSRAM and not recommended for other uses. + - USB-JTAG: GPIO 18 and 19 are used by USB-JTAG by default. In order to use them as GPIOs, USB-JTAG will be disabled by the drivers. + - RTC: GPIO0-5 can be used when in deep sleep. + + + + +.. only:: esp32s3 + + The {IDF_TARGET_NAME} chip features 45 physical GPIO pads (GPIO0 ~ GPIO21 and GPIO26 ~ GPIO48). Some GPIO pads cannot be used or do not have the corresponding pin on the chip package. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. + + 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:: @@ -801,6 +801,111 @@ Overview - 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 ESP32-S3R8 / ESP32-S3R8V board 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. +.. only:: esp32c2 + + The {IDF_TARGET_NAME} chip features 21 physical GPIO pads (GPIO0 ~ GPIO20). For chip variants with an SiP flash built in, GPIO11 ~ GPIO17 are dedicated to connecting the SiP flash; therefore, only 14 GPIO pins are available. 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>`__]. Each pad can be used as a general purpose I/O or can be connected to an internal peripheral signal. + + 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: 12 12 22 + + * - GPIO + - Analog Function + - Comment + + * - GPIO0 + - ADC1_CH0 + - RTC + + * - GPIO1 + - ADC1_CH1 + - RTC + + * - GPIO2 + - ADC1_CH2 + - RTC + + * - GPIO3 + - ADC1_CH3 + - RTC + + * - GPIO4 + - ADC1_CH4 + - RTC + + * - GPIO5 + - + - RTC + + * - GPIO6 + - + - + + * - GPIO7 + - + - + + * - GPIO8 + - + - Strapping pin + + * - GPIO9 + - + - Strapping pin + + * - GPIO10 + - + - + + * - GPIO11 + - + - + + * - GPIO12 + - + - SPI0/1 + + * - GPIO13 + - + - SPI0/1 + + * - GPIO14 + - + - SPI0/1 + + * - GPIO15 + - + - SPI0/1 + + * - GPIO16 + - + - SPI0/1 + + * - GPIO17 + - + - SPI0/1 + + * - GPIO18 + - + - + + * - GPIO19 + - + - + + * - GPIO20 + - + - + + .. note:: + + - Strapping pin: GPIO8 and GPIO9 are strapping pins. For more infomation, please refer to `ESP32-C2 datasheet `_. + - SPI0/1: GPIO12-17 are usually used for SPI flash and not recommended for other uses. + - RTC: GPIO0-5 can be used when in deep sleep. + .. only:: SOC_RTCIO_INPUT_OUTPUT_SUPPORTED