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VGA pinout
video connector
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Nearly all modern PC graphics cards use the same 15 pin VGA connector that the original
IBM VGA card used. VGA=Video Graphics adapter or Video Graphics Array.
15 pin highdensity
D-SUB
female connector
at the videocard
There are at least four versions of the VGA connector, which are the three-row 15 pin
DE-15 (also called mini sub D15) in original and DDC2 pinouts, a less featureful and far less
common 9-pin VGA, and a Mini-VGA used for laptops. The image and below table are the
15 pin highdensity
D-SUB
male connector
at the monitor cable
newer 15-pin VGA VESA DDC2 connector pinout.
VGA connector pinout:
Pin
Name
Dir
Description
RED
Red Video (75 ohm, 0.7 V p-p)
GREEN
Green Video (75 ohm, 0.7 V p-p)
BLUE
Blue Video (75 ohm, 0.7 V p-p)
ID2
Monitor ID Bit 2
GND
Ground
RGND
Red Ground
GGND
Green Ground
BGND
Blue Ground
KEY
10
SGND
Sync Ground
11
ID0
Monitor ID Bit 0
12
ID1 or SDA
Monitor ID Bit 1
13
HSYNC or CSYNC
Horizontal Sync (or Composite Sync)
14
VSYNC
Vertical Sync
15
ID3 or SCL
Monitor ID Bit 3
Key (No pin)
Note: Direction is Computer relative Monitor. All VGA pinout signals except R, G, B are TTL
level signals.
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VGA pinout : monitor ID detection pin assignments
4
11
12
ID2
ID0
ID1
n/c
n/c
n/c
no monitor
n/c
n/c
GND
Mono monitor which does not support 1024x768
n/c
GND
n/c
Color monitor which does not support 1024x768
GND
GND
n/c
Color monitor which supports 1024x768
GND means connected to ground
n/c means that the pin is not connected anywhere
This monitor type detection is becoming more and more obsolete nowadays. New VGA
plug-and-play monitors communicate with the computer according to VESA DDC standard.
VGA VESA DDC
VESA Display Data Channel is a method for integrating digital interface to VGA connector
so as to enable the monitor and graphics card to communicate. There are two different
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Related
pinouts:
VGA (9 pin)
VGA (VESA DDC)
VGA pinout and signals @ pinouts.ru
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levels of DDC: DDC1 and DDC2.
VGA DDC1
DDC1 allows the monitor to tell its parameters to the computer. The following VGA card
connector pins have to be changed to allow DDC1 functions:
VGA pin
9
new function
Optional +5V output from graphics card
12
Data from display
14
Standard vertical sync signal which works also as data clock
15
Monitor ID3
When the VGA graphics card detects data on data-line it starts to read the data coming
from the monitor synchronous to vertical sync pulse. Vertical sync pulse frequency can be
increased up to 25 KHz for the time of the data transfer if a DDC1 compliant monitor is
found (be sure not to send those high frequencies to non DDC1 monitors!).
VGA DDC2
DDC2 allows bidirectional communication: monitor can tell its parameters and the computer
can adjust monitor settings. The bidirectional data bus is a synchronous data bus similar to
Access Bus and is based on I2C technology. The following pins on VGA pinout have to be
changed to enable DDC2 to work:
VGA pin
9
new function
Optional +5V output from graphics card
12
Bidirectional data line (SDA)
15
Data clock (SLC)
The signals in the data bus are standard I2C signals. The computer provides 15 kohm
pullup for the SDA and SLC lines. Monitor must provide 47 kohm pull-up on SCLK line.
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Pinouts.ru > VGA, DVI, S-Video and other video connectors pinouts listing > Pinout of VGA and layout of 15 pin highdensity D-SUB
female connector and 15 pin highdensity D-SUB male connector
Source(s) of this and additional information: VGA pinout at the Hardware Book, Tomi Engdahl, wikipedia.org
Contributor: edited by g4vii
Last updated at 2008-07-27 21:01:41. Edit this page.
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