Short for Video Graphics Array, VGA is a popular display standard developed by IBM and introduced in 1987, VGA provides 640 x 480 resolution color display screens with a refresh rate of 60Hz and 16 colors displayed at a time. If the resolution is lowered to 320 x 200, 256 colors are shown.
In the above picture is an example of what the VGA (SVGA) cable and connector will typically look like on the monitor and on the back of the computer. The VGA standard has been replaced by SVGA and although these cables and connectors are still referred to as VGA they are technically SVGA.
Although it is not uncommon to still find this type of cable and connector with today's computers and monitors. This standard is becoming obsolete and being replaced by the DVI connector and cable.
VGA Pin functions
The illustration shows the 15-Pin VGA connector, its pin assignments, and size dimensions. As can be seen, the VGA connector has 15 holes and each hole (pin) has its own function as explained in the below chart, which describes each pin function
|4||Monitor ID 2|
|5||TTL Ground (monitor self-test)|
|6||Red Analog Ground|
|7||Green Analog Ground|
|8||Blue Analog Ground|
|9||Key (Plugged Hole)|
|11||Monitor ID 0|
|12||Monitor ID 1|
|15||Monitor ID 3|
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