Acer H257HU User Manual - Page 16

English 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- PIN No. Description 13 TMDS data 3+ 14 +5 V power 15 DVI detect 16 Hot-plug detection 17 TMDS data 018 TMDS data 0+ 19 TMDS data 0/5 shield 20 TMDS data 521 TMDS data 5+ 22 TMDS clock shield 23 TMDS clock+ 24 DDC TMDS clock- 4