VGA Vesa DDC显示接口
VGA 是 Video Graphics Adapter(Array) 的缩写，VESA 是 Video Electronics Standards Association 的缩写，DDC 是 Display Data Channel 的缩写，信号类型为模拟类型，显示卡端的接口为 15 针母插座：
显示器连线端的接口为 15 针公插头：
| 引脚定义 |
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | RED | | Red Video (75 ohm, 0.7 V p-p) |
| 2 | GREEN | | Green Video (75 ohm, 0.7 V p-p) |
| 3 | BLUE | | Blue Video (75 ohm, 0.7 V p-p) |
| 4 | RES | - | Reserved |
| 5 | GND | | Ground |
| 6 | RGND | | Red Ground |
| 7 | GGND | | Green Ground |
| 8 | BGND | | Blue Ground |
| 9 | +5V | | +5 VDC |
| 10 | SGND | | Sync Ground |
| 11 | ID0 | | Monitor ID Bit 0 (optional) |
| 12 | SDA | | DDC Serial Data Line |
| 13 | HSYNC or CSYNC | | Horizontal Sync (or Composite Sync) |
| 14 | VSYNC | | Vertical Sync |
| 15 | SCL | | DDC Data Clock Line |