chip-cn/Espressif/ESP32/ESP32-HDK-dat/ESP32-GPIOs-dat.md
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@@ -23,3 +23,35 @@ ESP32 共有 5 个 Strapping 管脚，可参考章节 6 电路原理图：
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| GPIO | 2 | pull-down |
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| MTDO | 15 | |
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| GPIO | 5 | |
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+
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+## Template
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+
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+| Pin | Prerequisite | Used for |
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+| --- | ------------ | -------- |
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+| 36 | input_only | |
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+| 39 | input_only | |
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+| 34 | input_only | |
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+| 35 | input_only | |
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+| 32 | | |
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+| 33 | | |
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+| 25 | DAC | |
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+| 26 | DAC | |
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+| 27 | | |
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+| 14 | | |
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+| 12 | | |
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+| 13 | | |
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+| 15 | strapping | |
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+| 2 | strapping | |
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+| 0 | strapping | |
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+| 4 | | |
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+| 16 | | |
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+| 17 | | |
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+| 5 | strapping | |
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+| 18 | | |
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+| 19 | | |
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+| 20 | | |
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+| 21 | | |
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+| 3 | U0R | |
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+| 1 | U0T | |
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+| 22 | | |
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+| 23 | | |