VGA (VESA DDC) connector

#Computer#Videocards connectors

VGA=Video Graphics Adapter or Video Graphics Array. VESA=Video Electronics Standards Association. DDC=Display Data Channel.

15 pin HIGHDENSITY D-SUB FEMALE connector pin-out & layout

15 pin HIGHDENSITY D-SUB FEMALE connector  at the videocard

PinNameDirDescription
1RED-->Red Video (75 ohm, 0.7 V p-p)
2GREEN-->Green Video (75 ohm, 0.7 V p-p)
3BLUE-->Blue Video (75 ohm, 0.7 V p-p)
4RES-Reserved
5GND---Ground
6RGND---Red Ground
7GGND---Green Ground
8BGND---Blue Ground
9+5V-->+5 VDC
10SGND---Sync Ground
11ID0<--Monitor ID Bit 0 (optional)
12SDA<->DDC Serial Data Line
13HSYNC or CSYNC-->Horizontal Sync (or Composite Sync)
14VSYNC-->Vertical Sync
15SCL<->DDC Data Clock Line
NOTE: There are 3 different protocols defined for DDC:
DDC1 - A unidirectional (display to host only) serial comm system which provides basic display ID and feature support information (including supported timings, display size, colorimetry and gamma, etc.) to the host. This uses pin 12 on the 15-pin "VGA" connector as a data line.
DDC2B - Adds clock (pin 15) and return (pin 11) to enable at least ID information to be obtained via an I2C interface. I2C is a bidirectional interface, but display control via DDC2B is not defined at this time.
DDC2AB - Full ID and control of the monitor via ACCESS.bus. As ACCESS.bus is basically a command and protocol definition on top of the I2C hardware interface, this uses the same lines as DDC2B. Note: Direction is Computer relative Monitor.

VGA (15) connector

WTX 12V CPU (P3) connector