Displayport / Hdmi Connectors - Seco COM-Express CCOMe-965 User Manual

3.3.14 DisplayPort / HDMI Connectors

Multimode DP + HDMI Combo Connector #1 - CN22
Display Port Section
Pin Signal Pin
1 DP1_LANE0+
3 DP1_LANE0-
5 GND
7 DP1_LANE2+
9 DP1_LANE2-
11 GND
13 DP1_CableAdapterDetect
15 DP1_AUX+
17 DP1_AUX-
19 GND
HDMI Section
Pin Signal Pin
1 TMDS1_LANE2+
3 TMDS1_LANE2-
5 GND
7 TMDS1_LANE0+
9 TMDS1_LANE0-
11 GND
13 ---
15 TMDS1_I2C_CLK
17 GND
19 TMDS1_HPD
CCOMe-965
CCOMe-965 - Rev. First Edition: 1.0 - Last Edition: 3.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
Signal
2 GND
4 DP1_LANE1+
6 DP1_LANE1-
8 GND
10 DP1_LANE3+
12 DP1_LANE3-
14 GND
16 GND
18 DP1_HPD
20 +3.3V_DP1
Signal
2 GND
4 TMDS1_LANE1+
6 TMDS1_LANE1-
8 GND
10 TMDS1_CLK+
12 TMDS1_CLK-
14 ---
16 TMDS1_I2C_DAT
18 +5V_HDMI1
According to COM Express specifications Rel.2.1, Type 6 pinout defines three Digital
Display interfaces (DDI), that can be used to carry out DisplayPort and TMDS (HDMI/DVI)
interface.
Two of these Digital Display Interfaces (DDI#1 and DDI#2) are carried
out on two DP+HDMI combo connector, CN22 and CN23, type
FREEPORT p/n 62EHDS-30AN0-P1-D, with the pinout shown in the
tables on the left (it is HDMI and Display Port standard pinout).
The signals reported on the table on the left don't come directly from
the COM Express module; they are opportunely switched by a
dedicated IC, Texas Instruments SN75DP122A DisplayPort 1:2
Switch with Integrated TMDS Translator.
Switching between the two interfaces is automatic when an external display is connected to
one of the two connectors. Please consider that only one at a time of these two interfaces
can work, it is not possible to use the DP and HDMI interfaces of the same connector
simultaneously. In case both connectors are used, then TMDS interface (HDMI/DVI) takes the
priority.
The Display Port connection is, effectively, a multimode Display Port (DP++): this means that it
is also possible to connect HDMI displays to that connector by using a DP-to-HDMI adapter.
In the case that HDMI (TMDS) interface is used, it is necessary to set properly jumper JP4, in
order to specify if the connector is used for real HDMI connection or for use of DVI Displays
through a dongle.
JP4 position TMDS1 Connected to
1-2 HDMI display
2-3 DVI dongle
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