Seco Qseven CQ7-D59 User Manual page 33

3.3.5 DP++/HDMI connectors
The CQ7-D59 carrier board is offered in two alternative configurations, which allow the connection of external monitors through a standard HDMI connector or a
multimode Display Port connector.
Please remember that the effective support of this kind of displays depends only by the Qseven
from the carrier board itself.
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This means that Qseven modules offering TMDS interface (which is common to HDMI and DVI displays) should be used with CQ7-D59 carrier boards equipped
with HDMI connector, while Qseven
Optional DP++ connector - CN18
Pin Signal
1 DP_LANE0+
3 DP_LANE0-
5 GND
7 DP_LANE2+
9 DP_LANE2-
11 GND
13 CAD
15 HDMI_CTRL_CLK / DP_AUX+
17 HDMI_CTRL_DAT / DP_AUX-
19 GND
DP_LANE0+/DP_LANE0-: Display Port differential pair #0.
DP_LANE1+/DP_LANE1-: Display Port differential pair #1.
DP_LANE2+/DP_LANE2-: Display Port differential pair #2.
DP_LANE3+/DP_LANE3-: Display Port differential pair #3.
DP_HPD: Hot Plug Detect Input signal.
HDMI_CEC: HDMI Consumer Electronics Control (CEC) Line. This signal is used only for HDMI compatibility when a HDMI adapter is connected to the DP connector.
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According to Qseven specifications, the signal is, in reality, a General Purpose 1_wire bus interface, that can be used for implementation of HDMI_CEC. In case the
CQ7-D59
CQ7-D59 - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.O. - Reviewed by S.B. Copyright © 2021 SECO S.p.A.
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modules offering DP or DP++ interface should be used with carrier board with DP connector mounted.
Pin Signal
2 GND
4 DP_LANE1+
6 DP_LANE1-
8 GND
10 DP_LANE3+
12 DP_LANE3-
14 HDMI_CEC
16 GND
18 DP_HPD
20 +3.3V_RUN
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module used with the carrier board, it is not a feature dependent
A first possible configuration is to have the carrier board with a Display Port connector
mounted.
In this case, the connector mounted will be type WinWin p/n
WDPE-20F3L1BU3 or equivalent, with the pinout shown in the
table on the left.
Such a pinout allows the implementation of a DP++ interface,
i.e. an interface able to support both DP and HDMI/DVI displays (by using dedicated
adapters). Please be aware that this feature is possible only in the case the Qseven
module used supports it.
When a DP cable is connected, then this interface will recognize it, and on pins 15/17
there will be the Display Port Auxiliary channel signals. Instead, when a DP-to-HDMI adapter
is mounted, it will drive opportunely the CAD signal, which will make available
HDMI_CTRL_CLK and HDMI_CTRL_DAT signals on the same pins.
Further signals involved in DP management are the following (please check the Qseven
connector's description table for a correspondence between DP lanes and TMDS lanes):
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