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147 lines
3.2 KiB
PHP
147 lines
3.2 KiB
PHP
.. 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 28 个物理 GPIO 管脚（GPIO0 ~ GPIO27）。
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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: 8 12 20
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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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-
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-
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* - GPIO1
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- ADC1_CH0
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-
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* - GPIO2
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- ADC1_CH1
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- Strapping 管脚
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* - GPIO3
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- ADC1_CH2
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- Strapping 管脚
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* - GPIO4
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- ADC1_CH3
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-
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* - GPIO5
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- ADC1_CH4
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-
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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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- 模拟比较器外部参考电压
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-
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* - GPIO11
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- 模拟比较器同相输入
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-
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* - GPIO12
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-
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-
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* - GPIO13
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-
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-
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* - GPIO14
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-
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-
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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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- SPI0/1
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* - GPIO19
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-
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- SPI0/1
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* - GPIO20
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-
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- SPI0/1
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* - GPIO21
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-
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- SPI0/1
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* - GPIO22
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-
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-
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* - GPIO23
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-
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-
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* - GPIO24
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-
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-
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* - GPIO25
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-
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- Strapping 管脚
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* - GPIO26
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-
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- USB-JTAG
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* - GPIO27
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-
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- USB-JTAG
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.. note::
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- Strapping 管脚： GPIO2、GPIO3、GPIO8、GPIO9 和 GPIO25 是 Strapping 管脚。更多信息请参考 `ESP32-H2 技术规格书 <{IDF_TARGET_DATASHEET_CN_URL}>`_。
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- SPI0/1: GPIO15-21 通常用于 SPI flash, 不推荐用于其他用途。
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- USB-Serial-JTAG: GPIO26 和 GPIO27 默认用于 USB-Serial-JTAG。用做 GPIO 时驱动程序将禁用 USB-Serial-JTAG。
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- 对于合封了 flash 的芯片型号， GPIO15 ~ GPIO21 专门用于连接该 flash, 并未引出至芯片管脚。且 GPIO6 ~ GPIO7 也未引出至芯片管脚，用户不可用。用户可配置使用其他剩余的 19 个 GPIO 管脚, 编号为: GPIO0 ~ GPIO5、GPIO8 ~ GPIO14、GPIO22 ~ GPIO27。
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- 对于未合封 flash 的芯片型号， 除了以上提到的给 Flash 专用的 GPIO 以外, GPIO22 也并未引出至芯片管脚，用户不可用。
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---
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