Display Data Channel (Ddc) - Acer ET221Q User Manual

Display Data Channel (DDC)

To make installation easier, so long as your system supports the DDC protocol, the monitor
is able to plug-and-play. The DDC is a communication protocol through which the monitor
automatically informs the host system about its capabilities; for example, supported
resolutions and corresponding timing. The monitor supports the DDC2B standard.
15-pin color display signal cable
11
PIN No. Description
1 Red
2 Green
3 Blue
4 Monitor ground
5 DDC-return
6 R-ground
7 G-ground
8 B-ground
4
1 5
10
6
15
PIN No. Description
9 +5V
10 Logic ground
11 Monitor ground
12 DDC-serial data
13 H-sync
14 V-sync
15 DDC-serial clock