15针VGA显示接口引脚定义
VGA 是 Video Graphics Adapter(Array) 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：
Pin
Name
DescripTIon
Pin
Name
DescripTIon
1
RED
Red Video (75 ohm, 0.7 V p-p)
9
KEY
Key (No pin)
2
GREEN
Green Video (75 ohm, 0.7 V p-p)
10
SGND
Sync Ground
3
BLUE
Blue Video (75 ohm, 0.7 V p-p)
11
ID0
Monitor ID Bit 0
4
ID2
Monitor ID Bit 2
12
ID1 or SDA
Monitor ID Bit 1
5
GND
Ground
13
HSYNC or CSYNC
Horizontal Sync (or Composite Sync)
6
RGND
Red Ground
14
VSYNC
VerTIcal Sync
7
GGND
Green Ground
15
ID3 or SCL
Monitor ID Bit 3
8
BGND
Blue Ground
