Kontron COMe-cPC2 - Manual (Page 44)

COMe-cPC2 / Features and Interfaces
3.17 Usage of Different Graphic Interfaces
The COMe-cPC2 offers VGA, PCIexpress Graphics, LVDS, HDMI, SDVO and Displayport interfaces to connect graphical user
interfaces. The usage of VGA, PCIexpress and SDVO complies with the current COM Express® Specification.
The principle of using them is shown in the next drawing.
VGA and LVDS interface is always available and can be used. The pins of PCIexpress Graphics either are used as PCIexpress
Graphics or as HDMI/SDVO/DP, which is controlled by switch1.
Switch1 is the SDVO_SDA# line (C73). When this signal is high (2.5V) the SDVO/HDMI/DP output is enabled. Otherwise the
lines can be used as PCIexpressGraphic.
The switch 2 to select HDMI, SDVO or Displayport consists of the devices detected on the regarding sense circuits. When
there is an SDVO 2 TV/LVDS/DVI converter found on the SDVO_DATA and _CLK lines (C73; D73) then the output is switched
to SDVO. When there is Displayport device found on the Displayport AUX lines (C71; C72) then it is Display port and in any
other case the output is switched to HDMI.
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