Display Data Channel (Ddc); Connector Pin Assignment - Acer HA220Q 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.

Connector pin assignment

15-pin color display signal cable
PIN No. Description
1 Red
2 Green
3 Blue
4 Monitor ground
5 DDC-return
6 R-ground
7 G-ground
8 B-ground
24-pin color display signal cable
PIN No. Description
1 TMDS data 2-
2 TMDS data 2+
3 TMDS data 2/4 shield
4 NC
5 NC
6 DDC clock
7 DDC data
8 NC
9 TMDS data 1-
10 TMDS data 1+
11 TMDS data 1/3 shield
12 NC
4
1
6
11
PIN No. Description
9 +5 V
10 Logic ground
11 Monitor ground
12 DDC-serial data
13 H-sync
14 V-sync
15 DDC-serial clock
PIN No. Description
13 NC
14 +5 V power
15 DVI detect
16 Hot-plug detection
17 TMDS data 0-
18 TMDS data 0+
19 TMDS data 0/5 shield
20 NC
21 NC
22 TMDS clock shield
23 TMDS clock+
24 DDC TMDS clock-
5
10
15