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VGA Monitor Connector

The VGA monitor connector is a three-row DB-9/15 (also called mini sub D15) connector for use with a VGA, SVGA, or XGA monitor. Figure 3-4 shows the pin configuration and Table 3-9 lists the signals and pin assignments.

Figure 3-4  VGA monitor connector

Table 3-9   Signals on the video connector

Pin

Signal name

Description

1 RED Red video signal
2 GREEN Green video signal
3 BLUE Blue video signal
4 n.c. No connect
5 GND Ground
6 RED_RTN Red video signal return
7 GREEN_RTN Green video signal return
8 BLUE_RTN Blue video signal return
9 n.c. No connect
10 GND Ground
11 n.c. No connect
12 SDA I2C data
13 HSYNC Horizontal synchronization signal
14 VSYNC Vertical synchronization signal
15 SCL I2C clock

The SDA and SCL signals use I2C protocols to transmit Extended Display Identification Data (EDID) from the display to the computer. The specifications for the SDA and SCL signals are included in the Display Data Channel (DDC) Standard published by the Video Electronics Standards Association (VESA). To obtain more information see Video Electronics Standards Association.


© 2000 Apple Computer, Inc. (Last Updated 04 Oct 00)