- USB-A (Male) USB-C (Male/Female)
- +-----------------------+ +----------------------------+
- | 1 VBUS (Red) 红色 |---------| A4 / A9 / B4 / B9 VBUS |
- | 2 D- (White)白色 |---------| A7 / B7 D- |
- | 3 D+ (Green)绿色 |---------| A6 / B6 D+ |
- | 4 GND (Black)黑色|---------| A1 / A12 / B1 / B12 GND |
- +----------------------+ +-----------------------------+
- Optional (for Type-C devices to recognize legacy cable):
- USB-C pin A5 (CC1) → 5.1kΩ pulldown to GND 下拉电阻到 GND
- USB-C pin B5 (CC2) → 5.1kΩ pulldown to GND 下拉电阻到 GND
- ```
- ### Notes:
- * **Power (VBUS, GND) and Data (D+/D-)** are the only required wires for USB 2.0 devices.
- * **CC pins (Configuration Channel)** are required if you’re plugging into a Type-C host — they let the host know a legacy device is connected. The 5.1kΩ resistor to GND is the standard way.
- * If you skip CC resistors, some hosts may not power your adapter.
- * This wiring will NOT give you USB 3.0/3.1 speeds (no SuperSpeed pairs connected).
- * **电源 (VBUS, GND) 和数据 (D+/D-)** 是 USB 2.0 设备唯一必需的线材。
- * 如果您要插入 Type-C 主机，则需要 **CC 引脚（配置通道）**——它们会告知主机已连接旧设备。5.1kΩ 下拉电阻接地是标准方式。
- * 如果您省略 CC 电阻，某些主机可能无法为您的适配器供电。
- * 此接线方式无法提供 USB 3.0/3.1 速度（未连接超高速线对）。
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