Display Data Channel (Ddc) - Acer H277HK 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.
24-pin color display signal cable
PIN No. Description
1 TMDS data 2-
2 TMDS data 2+
3 TMDS data 2/4 shield
4 TMDS data 4-
5 TMDS data 4+
6 DDC clock
7 DDC data
8 NC
9 TMDS data 1-
10 TMDS data 1+
11 TMDS data 1/3 shield
12 TMDS data 3-
19-pin color display signal cable
PIN No. Description
1 TMDS Data2+
3 TMDS Data2-
5 TMDS Data1 Shield
7 TMDS Data0+
9 TMDS Data0-
11 TMDS Clock Shield
13 CEC
15 SCL
17 DDC/CEC Ground
19 Hot Plug Detect
4
PIN No. Description
13 TMDS data 3+
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 TMDS data 5-
21 TMDS data 5+
22 TMDS clock shield
23 TMDS clock+
24 DDC TMDS clock-
19 17 15 13 11
18 16 1412
PIN No. Description
2 TMDS Data2 Shield
4 TMDS Data1+
6 TMDS Data1-
8 TMDS Data0 Shield
10 TMDS Clock+
12 TMDS Clock-
14 Reserved (N.C. on device)
16 SDA
18 +5V Power
9 7 5 3 1
10 8 6 4 2