2022-11-09 16:11:36 +08:00
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.. This file gets included from other .rst files in this folder.
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.. It contains target-specific snippets.
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.. Comments and '---' lines act as delimiters.
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..
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.. This is necessary mainly because RST doesn't support substitutions
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.. (defined in RST, not in Python) inside code blocks. If that is ever implemented,
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.. These code blocks can be moved back to the main .rst files, with target-specific
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.. file names being replaced by substitutions.
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.. gpio-summary
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{IDF_TARGET_NAME} 芯片具有 22 个物理 GPIO 管脚（GPIO0 ~ GPIO21）。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 GPIO 交换矩阵和 IO MUX，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>`__]。
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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。
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.. list-table::
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:header-rows: 1
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:widths: 12 12 22
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* - GPIO
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- 模拟功能
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- 注释
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* - GPIO0
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- ADC1_CH0
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- RTC
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* - GPIO1
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- ADC1_CH1
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- RTC
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* - GPIO2
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- ADC1_CH2
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- Strapping 管脚；RTC
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* - GPIO3
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- ADC1_CH3
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- RTC
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* - GPIO4
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- ADC1_CH4
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- RTC
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* - GPIO5
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- ADC2_CH0
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- RTC
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* - GPIO6
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-
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-
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* - GPIO7
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-
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-
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* - GPIO8
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-
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- Strapping 管脚
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* - GPIO9
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-
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- Strapping 管脚
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* - GPIO10
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-
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-
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* - GPIO11
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-
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-
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* - GPIO12
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-
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- SPI0/1
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* - GPIO13
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-
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- SPI0/1
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* - GPIO14
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-
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- SPI0/1
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* - GPIO15
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-
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- SPI0/1
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* - GPIO16
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-
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- SPI0/1
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* - GPIO17
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-
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- SPI0/1
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* - GPIO18
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-
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- USB-JTAG
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* - GPIO19
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-
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- USB-JTAG
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* - GPIO20
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-
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-
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* - GPIO21
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-
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-
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.. note::
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2023-03-14 10:18:22 +08:00
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- Strapping 管脚：GPIO2、GPIO8、和 GPIO9 是 Strapping 管脚。更多信息请参考 `ESP32-C3 技术规格书 <{IDF_TARGET_DATASHEET_CN_URL}>`_。
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2022-11-09 16:11:36 +08:00
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- SPI0/1：GPIO12-17 通常用于 SPI flash 和 PSRAM，不推荐用于其他用途。
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- USB-JTAG：GPIO18 和 GPIO19 默认用于 USB-JTAG。用做 GPIO 时驱动程序将禁用 USB-JTAG。
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- RTC：GPIO0-5 可以在 Deep-sleep 模式时使用。
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---
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